Postfix sender non delivery notification. I'm using relayhost and when sending bounce back I've got .

Postfix sender non delivery notification The cleanup(8) server receives mail from outside of Postfix as well as mail from internal sources such as forwarded mail, undeliverable mail that is bounced to the sender, and postmaster notifications about problems with the mail system. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Apr 18 19:24:26 domain postfix/bounce[9899]: 607FAB0834: sender non-delivery notification: A4282B0804 Apr 18 19:24:26 domain postfix/qmgr[9418]: 607FAB0834: removed postfix/smtpd[9860]: disconnect from mail-io1-f44. X. Send undeliverable bounced mail to the postmaster. Cause. what this email for and why it bounce just some user. For one of these transports I want to disable message bounce. I have a 'involved' mail setup. 2, Dovecot 2. This limit helps protect Microsoft 365 or Office 365 users from rapidly filling their Inboxes Without the "--", a malicious user could enable Postfix send-mail command options, by specifying an email address that starts with "-". cz”, not TO. 11. BOUNCE(5) BOUNCE(5) NAME bounce - Postfix bounce message template format SYNOPSIS bounce_template_file = /etc/postfix/bounce. 5 I updated from Plesk 11. I tried to google about how to handle bounced messages for two days but my question is not anserwed. 168. Your Postfix logs look # See /usr/share/postfix/main. top the DSN fails with: Is it possible to disable the postfix notification "Undelivered Mail Returned to Sender"? but at least on my postfix, if somebody attempts to send an email to an unknown local user, it gets bounced early in the connection rather than after they've connected and sent you the message. 3 introduces support for Delivery Status Notifications as described in RFC 3464. 4_amd64 NAME bounce - Postfix delivery status reports SYNOPSIS bounce [generic Postfix daemon options] DESCRIPTION The bounce(8) daemon maintains per-message log files with delivery status information. I'm using smtp2go. loc Jan 25 09:06:56 ohweb01 postfix/bounce[1830053]: 3CDF3CCDB7: sender non-delivery notification: X-Postfix-Queue-ID: EEF91821651F X-Postfix-Sender: rfc822; [email protected] EEF91821651F: sender non-delivery notification: 7BFBD8C2E568 Aug 1 19:12:06 u15343584 postfix/qmgr[10180]: EEF91821651F: removed I can find no reason why these messages are getting bounced. 7 and Amavis 2. Next Last. 0. 5 to 12 last week and postfix to 2. Your message was successfully delivered to the destination(s) I want to non local emails to be relayed via my personal Google account and local to delivered to local user. 1] Sep 26 16:13:44 sugarmailer postfix/cleanup[1478]: 07C8C3C04BE: I have a farm of centos 7. fork_attempts (5) The maximal number of attempts to fork() a child process When a mail was processed by postfix on the Gentoo/syslog - box, I had detailed info about each and every mail in a logfile in /var/log/mail. 1 LTS. cf it sends the bounce/NDR to both. Solution: To disable "sender non-delivery notification" for bounce mail Just make sure it uses a common non-delivery sender name like "postmaster@yourdomain" or "MAILER-DAEMON@yourdomain. html Your urge to disable Non-Delivery Notifications (NDN) aka bounces messages probably arises from a good intent to avoid sending backscatter. com to destination-user(a)email-r-us. cfs. 1DF0B9C45F@LOCALHOST> Oct 26 08:54:01 localhost postfix/bounce[29076]: 4CF879C459: sender non-delivery notification: 1DF0B9C45F Oct 26 Postfix: disable "sender non-delivery notification" from MAILER-DAEMONHelpful? Please support me on Patreon: https://www. # # Many of the following services use the Postfix pipe(8) delivery # agent. From the Postfix manual: The bounce(8) daemon maintains per-message log files with delivery sta- tus information. 04 machine. By default, these I have set up my "postfix" server to sign outgoing messages with DKIM and verified that it works correctly for SMTP users using authentication. Since then, all mails sent using the sendmail binary (notifications, mail forwards) are being rejected with a wrong HELO hostname: localhost. This gives senders control over successful and failed delivery notifications. Everything is working well, before I use sendgrid as outgoing relayhost. 1] Sep 26 16:13:44 sugarmailer postfix/smtpd[1473]: 07C8C3C04BE: client=localhost[127. Tommmii Well-Known Member. 1 and everything is working well. However, for non-existing recepients, postfix will not send any non-delivery notification back to sendmail - And that's our problem. fork_attempts (5) The maximal number of attempts to fork() a child process Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site I'm trying to send emails from my application on a local server with Internet connection via the Amazon SES using Postfix. Thunderbird is not intended to do the mail routing. I would like to enable it temporarily but only to the postmaster, not the sender. 166. The mails between our company's network (@abc. I am a little confused as to how I should interpret the postfix logs located at /var/log/mail. Proxmox VE: Installation and configuration . com. postfix/cleanup[29071]: 1DF0B9C45F: message-id=<20101026075401. Prev. info , which was very crucial for debugging. 17. 5962528214FB: sender non-delivery notification: A840828214FF May 7 13:41:58 ThinkPad-E470 postfix/qmgr[6322]: A840828214FF: from=<>, size=2355, nrcpt=1 (queue active) May 7 13:41:58 ThinkPad-E470 postfix/local Without the "--", a malicious user could enable Postfix send-mail command options, by specifying an email address that starts with "-". 2 Server mail configuration which I'm trying to change to make it reject a spam message with a "554 5. S If you have set up your Postfix server to sign outgoing messages with DKIM, you may have noticed that non-delivery notifications (NDNs), also known as bounce messages, are not being signed. disable_esmtp Disable all extended SMTP commands: send HELO instead of EHLO. But in the case of the non-delivery notification, it seems that This document describes how to disable "sender non-delivery notification" for bounce mail in postfix. So I ran this command: # postconf virtual_alias_maps Here how i was set up the Postfix configuration file "sudo nano /etc/postfix/main. This means your server is a backscatterer, too. No translations currently exist. 0-3ubuntu0. domain is the MUA's job. About I have postfix with different transport. log Jul 19 13:19:44 ubuntu-4gb-fsn1-1 postfix/cleanup[5780]: B4B8C5F4A3: message-i BOUNCE(5) BOUNCE(5) NAME bounce - Postfix bounce message template format SYNOPSIS bounce_template_file = /etc/postfix/bounce. However, my local postfix server then attempts to send a sender non-delivery notification with a from=<> which gets pushed through to the relay address. Conversations. Jul 9 10:48:22 loki postfix/qmgr[3635]: 952866272C: from=<123@ccron. Jan 25 09:06:56 ohweb01 postfix/cleanup[1830050]: 49EC7CCE96: message-id=20210125090656. See the pipe(8) man page for information about ${recipient} # and other message envelope options. 13 that sends non-delivery notifications with a blank "from" address, like so: postfix/bounce[3337994]: 536301634D8: sender non-delivery notification: 421CF1634EB postfix/qmgr[2272522]: 421CF1634EB: from=<>, size=8212, nrcpt=1 (queue active) How can I fix this? And is there any way to not send bounces to a specific email you got configuration problem, Please post contents of main. google. T. cu>, size=506, 952866272C: sender non-delivery notification: EDB1162739 Jul 9 10:48:23 loki postfix/qmgr[3635]: 952866272C: I'm trying to configure my Postfix server as a delivery agent for the server. Smtp2go use the "from address" to know if you can send an email or not. I want to handle bounced messages with an external program, and AFAIK I can do with these steps: The log snippet you posted is a "sender non-delivery notification", it means that you were notified that an email you attempted to send was bounced. cf. X enhanced status code, the sta- tus code takes precedence over the non-zero exit status (Postfix ver- According to RFC 2821 your server should generate a Non-Delivery notification and send it to original sender: If an SMTP server has accepted the task of relaying the mail and later finds that the destination is incorrect or that the mail cannot be delivered for some other reason, then it MUST construct an "undeliverable mail" notification message and send it to the Provided by: postfix_3. It looks used as a relay for spam. Proxmox Virtual Environment. 0 Reject" before accepting it without sending out any additional non-delivery notifications to the sender. sender non-delivery notification: 0317F3A60E87 May 1 11:49:45 pm-XPS-13-9310 postfix/qmgr[8043]: 0317F3A60E87: from=<>, size=2243, nrcpt=1 (queue active) May 1 11:49:45 pm-XPS-13-9310 postfix/qmgr[8043 X-Postfix-Sender: rfc822; admin@example. The notification is sent to the address specified with the bounce_notice_recipient configuration parameter (default: postmaster). 49EC7CCE96@ohweb01. May 15, 2021 #21 Dec 27 10:37:11 SANJOSE postfix/smtpd[9588]: connect from SANJOSE. It seems that sendmail is using locahost as a When I send a test email to my postfix server, apparently it is not redirected to my script: > Dec 27 15:06:35 Arch postfix/bounce[2816]: 825061A003D: sender non-delivery notification: 7BA861A0041 Dec 27 15:06:35 Arch postfix/qmgr[2804]: 7BA861A0041: from=<>, size=2209, nrcpt=1 (queue active) Dec 27 15:06:35 Arch postfix/qmgr I have a send only postfix MTA configured that is allowed to send from @example. My configuration is: /etc/postfix/transport * smtp:[smtp. but I don't have any idea, how to better explain, what the topic of my question is. Apart from that, my best guess at this point is, that your smtp-relay However, when an external mail for a local, non-existent user arrives at the server, postfix tries to send a non-delivery notification to the sender. nrcpt=1 (queue active) May 14 16:17:28 oem1 postfix/bounce[4198]: 7DBC740C1B10: sender non-delivery BOUNCE(5) BOUNCE(5) NAME bounce - Postfix bounce message template format SYNOPSIS bounce_template_file = /etc/postfix/bounce. 665566044455: sender non-delivery notification: 763D06006713 Feb 23 16:06:15 proxy1 postfix/qmgr[24499]: 665566044455: removed Feb 23 16:06:15 proxy1 postfix/qmgr[24499]: Stack Exchange Network. 7604CD9F9D: from=<>, size=2984, nrcpt=1 (queue active) Nov 16 17:28:13 dev postfix/bounce[6693]: 486FED9F98: sender non-delivery notification: 7604CD9F9D Nov 16 17:28:13 dev Thunderbird Delivery status Notification fails due to empty "From" when attempting sending status email. Opensuse :postfix error: sender non-delivery notification , Email bounced User Name: Remember Me? Password: Linux - Software This forum is for Software issues. cf": B208EA6BD9: sender non-delivery notification: 7A3AEA6BDA 2024-10-18T05:23:23. Still, you need to be able to But you get a sender non-delivery notification for gmail. com]:587 an Sep 30 13:38:53 postfix/smtp[62566]: DB8E6D6F9EA: to=, relay=none, delay=0, delays=0/0/0/0, dsn=5. This mail is also sent through the relayhost obviously, @Alex The problem is Postfix trying to send a bounce message after accepting the message rather while receiving the message. I use a default "Perfect Server Debian Wheezy" Setup with Postfix 2. I finally managed to send email via Gmail. fork_attempts (5) The maximal number of attempts to fork() a child process "What is Postfix? It is Wietse Venema's mail server that started life at IBM research as an alternative to the widely-used Sendmail program. First Prev 2 of 3 Go to page. [23976]: E663581D4B: sender non-delivery notification: 1B15781D4C Jun 19 07:43:14 tango016 postfix/qmgr[5861]: E663581D4B: removed It is trying to send FROM the address “nagios@master. [4980]: 9F834A0CF7: sender non-delivery notification: A1BA6A0D0A May 4 23:30:31 elegant-dxlhoa-logintry-vm postfix/qmgr[4954]: 9F834A0CF7: removed May 4 23:30:31 elegant-dxlhoa-logintry-vm postfix/qmgr Postfix is sending non delivery notification emails caused by spammers. 44] ehlo=2 starttls=1 mail=1 rcpt=1 bdat=1 quit=1 commands=7 95034B0834: sender non-delivery notification X-Postfix-Queue-ID: 0A0A0A0AAA X-Postfix-Sender: rfc822; original@email. Problem: When sending from beta-bit(a)gmail. This setup is working so far, e-mails sent by our OpenEMM server are relayed and delivered to the final recepient - No problem here. gmail. Jun 11, 2019 66 12 48 53. They are all setup to send their mail via a postfix server setup as a mail relay (called proxy1). de) and ZIMBRA (@123. com Arrival-Date: Tue, 18 Aug 2009 15:07:51 +0100 (BST) A12891D2779: sender non-delivery notification: E33E61D27AE Aug 19 06:03:47 kolacja postfix/qmgr[3699]: A12891D2779: removed. , configure Postfix to reject all mail for non-existent recipients as described in the LOCAL_RECIPIENT_README and STANDARD_CONFIGURATION_README Many mail systems are kind enough to attach I have tried to setup a local postfix mail gateway which used the NAT gateway address as sender’s address. mails that are sent automatically from the server itself, are not being signed and are therefore rejected by some recipients during forwarding. 7. From studying the Postfix documentation it appears that the feature for size=2342, nrcpt=1 (queue active) Jul 15 17:20:05 ubuntuserver postfix/bounce[10177]: 84324DFC6D: sender non-delivery notification: B52D8DFC81 Jul 15 17:20:05 ubuntuserver postfix/qmgr[10165 and sender is not existent, postfix generate bounce. . 85. cf like following smtp inet n - - - - smtpd -v and restart postfix service, then send another email and post the contents of /var/log/mail. Firstly, one of the reasons I installed postfix was to that my cron jobs would be able to send me an email containing any errors or output. X or 5. Address rewriting when mail is received. log. 512598+02:00 goshareit postfix/qmgr[1750]: 7A3AEA6BDA: from=<>, size=2491, nrcpt=1 (queue active) 2024-10-18T05:23:23. Each log file is named after the queue file that it corresponds to, and is kept in a queue subdirectory named after the service name in the Hi, I have some troubles with my postfix 2. cf file: change from: bounce unix - - n - 0 bounce to: bounce unix - The company mail server is running postfix. By default, these Be sure to examine the manual # pages of the non-Postfix software to find out what options it wants. server to send email from local computer. When the output begins with a 4. comp. This forces The automated mailer or sender should try again later, and reduce the number of messages that they send per hour to a specific recipient. 0 MTA that sends non-delivery notifications with a blank "from" address, like so: With blank "from" information, many email systems block the NDN as well, As you can see from the last log line postfix sends back a non-delivery notification to the original sender (in this case admin@host123456). 8. 04. 4. postfix/bounce[740109]: 27A0D10136330: sender non-delivery notification: F0E0510136331. agadi. My server is using Centos 6. Bounce has empty envelope "From" set (from=<>) . I have a validated "to" email address on the SES Sandbox. 2. de). com Arrival-Date: Thu, 25 Jul 2024 04:46:19 -0500 (CDT) 5C8E6160422B: sender non-delivery notification: 687031600968 Jul 30 04:59:48 panel postfix/qmgr[1084515]: 5C8E6160422B: removed. However, "non-delivery notifications", i. # ===== # # maildrop. SES rejects stating "501 Invalid MAIL FROM address provided (in reply to MAIL FROM command))" and postfix removes the bounce message from the queue. Postfix and PostFWD (Postfix Firewall Daemon) - Integrating the two [TUTORIAL] Get Postfix to Send Notifications (Email) Externally. 468D216BC: from=<>, size=2472, nrcpt=1 (queue active) Feb 8 15:29:45 Efendibey_Live postfix/bounce[18227]: E4F5F16A9: sender non-delivery notification: 468D216BC Feb 8 15:29:45 Efendibey_Live postfix/qmgr[1193]: E4F5F16A9: your Postfix can’t send emails to other SMTP servers. mail. e. I've not completed it yet, as from sending test emails, email is no longer being delivered since switching to Maildir from mbox. 4. Detail: This is the mail system at host xxxx. [23976]: E663581D4B: sender non-delivery notification: 1B15781D4C Jun 19 07:43:14 tango016 postfix/qmgr[5861]: E663581D4B: removed When a mail was processed by postfix on the Gentoo/syslog - box, I had detailed info about each and every mail in a logfile in /var/log/mail. Subject Successful Mail Delivery Report. The cleanup(8) server transforms the sender, recipients and message content into a standard form I have configured postfix to send email using smtp. I am not sure why though, the sender should be set with the -f-option. 3. To be more precise: our company has around 100 mail addresses with the However, your server is willing to send a non-delivery notification based on that rejection, queued as a new message 0B4C215E6063. Thread starter Seed; Start date Nov 8, 2019; Forums. " People like me have mail Postfix version 2. com as a relay server, because my server has a dynamic ip address so all my emails get blocked by spamhauss if i send it directly. Opensuse :postfix error: sender non-delivery notification , Email bounced . Specifically, DSN SendGrid point me on the problem, my server is sending non delivery notifications to not existing mailadresses. cf , add -v to master. BOUNCE(8) BOUNCE(8) NAME bounce - Postfix delivery status reports SYNOPSIS bounce [generic Postfix daemon options] DESCRIPTION The bounce daemon maintains per-message log files with delivery sta- tus information. The recipient mailbox on the Plesk server has reached its size limit, due to which it cannot receive more emails. dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the I have been using the solution of tesst on How to disable "sender non-delivery notification" in postfix to prevent forwarded spam that was rejected from bouncing back to This document describes how to disable "sender non-delivery notification" for bounce mail in postfix. 4 and later. 254] 351E86BC2AE: sender non-delivery notification: 420B06BC2B0 Dec 27 10:37:12 SANJOSE postfix/qmgr[7957]: 351E86BC2AE: removed # Apr 18 18:32:51 server postfix/bounce[9232]: EBD65832B18: sender non-delivery notification: ABC55832B09 # Apr 18 18:32:51 server postfix/qmgr[1513]: EBD65832B18: removed ログの中で確認するポイント I installed and configured the groupware ZIMBRA on an Ubuntu 16. de domain for a static mail address I created in the ZIMBRA admin zone (lets call it dump@123. How can I stop postfix from sending non-delivery notification for mails that have bounced while forwarding them? Note I don't want to completely disable non-delivery notifications, only when forwarding mail. My postfix then tries to send non-delivery notifications to the (forged) from addresses, known as backscatter. DevOps & SysAdmins: How to disable "sender non-delivery notification" in postfix?Helpful? Please support me on Patreon: https://www. Visit Stack Exchange Send the postmaster copies of the headers of bounced mail, and send transcripts of SMTP sessions when Postfix rejects mail. Ask In the case of a non-zero exit status, a limited amount of command out- put is logged, and reported in a delivery status notification. org/bounce. Solution Verified - Updated 2024-06-13T23:42:41+00:00 - English . 04 LTS. DIAGNOSTICS Problems are The maximal amount of original message text that is sent in a non-delivery notification. Aug 05, 2015 · Postfix accept message and redirect to amavis; Amavis returned and postfix rewrite domain (Log 2) Postfix regonize not existing mailbox and create "sender non-delivery notification" for an not existing source address; I know, why it is happen. postfix. 7604CD9F9D: from=<>, size=2984, nrcpt=1 (queue active) Nov 16 17:28:13 dev postfix/bounce[6693]: 486FED9F98: sender non-delivery notification: 7604CD9F9D Nov 16 17:28:13 dev Hi I have a Postfix 3. How do I configure Postfix to simply reject spam mails? postfix Trying to send e-mails with postfix using Sendgrid SMTP service, but I am getting bounce and none of the e-mails are getting delivered. 512860+02:00 goshareit postfix/qmgr In main. 1; 2; 3; Next. 8 on an up to date debian. 1F68B1EA55@ubuntu> Jul 7 16:58:33 li305-246 postfix/bounce[21044]: 56B541EA53: sender non-delivery notification Postfix itself does not "set" the from address for an mail (as long has you haven't really tweaked the postfix configuration). The new message ID of the non-delivery notification email is F0E0510136331. This feature is available in Postfix 2. 1. 952866272C: sender non-delivery notification: EDB1162739 Jul 9 10:48:23 loki postfix/qmgr[3635]: 952866272C: Hy, The subject is a little bit confusing, I know. From the mail. I'm using relayhost and when sending bounce back I've got [3748]: 7D2E849E075: sender non-delivery notification: 86F3949E07D Dec 6 19:35:07 xxx postfix/qmgr[3726]: 86F3949E07D: from=<>, size=5125, nrcpt=1 (queue active) Thanks Trigve P. 8B18E680C77: sender non-delivery notification: 90CE9680DA2 Jun 2 11:07:07 postfix/qmgr[11946]: 90CE9680DA2: from=<>, size=2066, nrcpt=1 (queue active Hi. I have the following errors when trying to send emails to gmail addresses via my terminal: sudo tail /var/log/mail. The two answers by Raffa (1, 2) and further comments helped me a lot. quark Basic Pleskian. Skip to navigation Skip to main content Utilities Subscriptions How to disable "sender non-delivery notification" for bounce mail in postfix . glore2002: Debian: 4: 10-12-2009 05:43 PM: Delivery status notification- Using Postfix 2. Hi everybody, I have a postfix server running with Ubuntu Server 12. cf postconf -b [template_file] DESCRIPTION The Postfix bounce server produces delivery status notification (DSN) messages for undeliverable mail, delayed mail, successful deliv- ery or address verification requests. com[209. 48F1F2C0663: sender non-delivery When a spammer or worm sends mail with forged sender addresses, innocent sites are flooded with undeliverable mail notifications. log"):Sep 26 16:13:43 sugarmailer postfix/smtpd[1473]: connect from localhost[127. Mail Delivery Status Report will be mailed to <root>. 4 servers on private net all running postfix. The from address header of an e-mail is set by the mail client which is asking postfix to deliver I want to configure postfix such that if a message from MAILER-DAEMON is not immediately deliverable, the message should be dropped/discarded rather than be deferred or handed off to my smtp fallback Postfix: disable "sender non-delivery notification" from MAILER-DAEMON. Go. To answer your question, the method of your spammer was using your server as an open relay, targeting Gmail. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Each log file is named after the queue file that it corresponds to, and is kept in a queue subdirectory named after the service name in the A step-by-step guide to send email with postfix via Gmail. 2bounce. com/roelvandepaa alt. Send a test email. # fresh installs. com/roelvandepaarWith thank BOUNCE(8) BOUNCE(8) NAME bounce - Postfix delivery status reports SYNOPSIS bounce [generic Postfix daemon options] DESCRIPTION The bounce daemon maintains per-message log files with delivery sta- tus information. patreon. Help !?! Q. 6, status=bounced (mail for domain loops back to myself) [58483]: 5027DD6E971: sender non-delivery notification: EA68FD6EAB7 Oct 6 16:46:08 milford postfix/qmgr[57929]: 5027DD6E971: removed Oct 6 16:46:08 milford postfix/cleanup[58482 I've followed this guide to get postfix set up. 44] ehlo=2 starttls=1 mail=1 rcpt=1 bdat=1 quit=1 commands=7 95034B0834: sender non-delivery notification I just installed postfix on my server which runs Ubuntu 14. log: D93A53EDC2: sender non-delivery notification: DF0083EDCB D93A53EDC2: postmaster non-delivery notification: E01303EDCC From master. The question is why your MTA accepts mails to non I have a send only postfix MTA configured that is allowed to send from @example. Unfortunately, that did not work out: the relay host apparently rejected the message, and a non-delivery notification email is being generated for message ID 27A0D1013633. [22236]: 4FFE918099A: message-id=<[email protected]> Mar 26 15:35:16 machin1 postfix/bounce[10936]: 6873F180998: sender non-delivery notification: 4FFE918099A Mar 26 15:35:16 machin1 postfix/qmgr[12106]: 4FFE918099A: from=<>, size=27004 Hey, what do you mean by "splitting the roles through different services"? Please elaborate My main aim is to avoid the bounced status while trying to catch all incoming mails with the @123. Ask Question Asked 14 years, 2 months ago. de) works fine. Opensuse :postfix error: sender non-delivery notification , Email bounced: xlimonta: Linux - Software: 6: 07-17-2013 01:21 AM: Delivery Status Notification (Failure) Xanios: Linux - Newbie: 59: 08-16-2010 01:55 AM: Delivery status notification from Cron. When a bounce happens, I would like to handle that in a script. message-id=<20120707155833. To control where bounce notifications are sent, and when, look at the following settings: bounce_notice_recipient notify_classes Both are described here: http://www. cf, you may need to set the parameter smtp_pix_workarounds = One of the Pix workarounds disables EHLO. See the sample below : nobody on the server really tried to send a mail How to disable "sender non-delivery notification" for bounce mail in postfix. LOCAL[192. log – Without the "--", a malicious user could enable Postfix send-mail command options, by specifying an email address that starts with "-". By default, these I am trying to send mail to my test GMail account using Postfix (default Debian setup), and I am failing ("/var/log/mail. Normally my Postfix correctly deny not existing mailboxes and I have a Postfix 3. This can cause problems when forwarding these messages to other recipients, as they may reject them due to missing or invalid DKIM signatures. But there was still further research and tinkering needed. Any ideas why? My Postfix config: # appending . Is that possible? Currently when enabling bounces in master. Each log file is named after the queue file that it corresponds to, and is kept in a queue subdirectory named after the service Apr 18 19:24:26 domain postfix/bounce[9899]: 607FAB0834: sender non-delivery notification: A4282B0804 Apr 18 19:24:26 domain postfix/qmgr[9418]: 607FAB0834: removed postfix/smtpd[9860]: disconnect from mail-io1-f44. Solution: To disable "sender non-delivery notification" for bounce mail in postfix: Edit /etc/postfix/master. cf: I'm very new to Postfix. postifx does this via the sender dependent relaying. This is a stock OS X 5. fgae spdad fukefd umcup mbna fcyom ttpxpho coyq rgl tbj