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Questions tagged [postfix]

Free and open source mail transfer agent (MTA) that routes and delivers email. When asking about postfix problem, please include the relevant maillog lines and output of the following command: `postconf -n` (non-default content of main.cf) and `postconf -M` (content of master.cf)

Postfix is a mail transfer agent (MTA) that supports IPv6, DNSBL, SMTP AUTH (SASL), TLS and various database backend.

Postfix was written by Wietse Venema in 1997 and first released in December 1998 as IBM Secure Mailer.

It was designed to be highly secure and configurable, and is a drop-in replacement for , with much simpler configuration syntax.

The software was also formerly known as VMailer.

6398 questions
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Temporary authentication failure 454 4.7.1 : Relay access denied

I can receive mail, but cannot send to outside world in Squirrelmail. Message not sent. Server replied: Temporary authentication failure 454 4.7.1 : Relay access denied I double checked that postfix works, i.e. able to…
Yerbol
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Postfix smtp client HELO on dualstack ipv4/ipv6

I have a Postfix mail server configured for outbound email, on a dual stack (IPv4 + IPv6) server. The IPv4 address is private as it's shared with other services on the same connection (SNATed to public IPv4) and the IPv6 address is public and unique…
Kirill Shatalaev
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Why the ip can't be banned with postfix blacklist?

vim /etc/postfix/main.cf smtpd_recipient_restrictions = check_sender_access hash:/etc/postfix/access Add some ips in /etc/postfix/access vim /etc/postfix/access 86.111.171.141 REJECT 191.96.249.63 REJECT Restart postfix. postmap…
scrapy
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Postfix: spam mail in queue despite no open relay

I've recently closed an open-relay in my postfix configuration. Various web-checkers (e.g. http://www.mailradar.com/openrelay/) confirm that the relay is not open. However, despite clearing the queue several times using postsuper -d ALL, new…
A. Slosar
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Blacklist recipient email addresses

I have a mail server on Ubuntu using Postfix and Dovecot and SpamAssassin. In Postfix I am using "plus addressing" via the recipient_delimiter option. So, for example foo_junker@me.com and foo_stupid@me.com are valid and actually deliver to the foo…
Phrogz
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For fresh Linux setups, do we still have to worry about Heartbleed, Logjam, etc.?

There was a period a while back when a bunch of serious vulnerabilities were found. Heartbleed, Logjam, POODLE, FREAK, etc. Nothing major like that has come up during the past year. Question: If I setup a brand-new Linux VPS today with say Ubuntu…
SUPower
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Applying a content filter to a specific email address in Postfix

How can I apply a content filter to a specific email address in Postfix? Setting the content_filter parameter in main.cf applies the content filter to all inbound messages. I only want to apply my filter to a specific address, e.g.…
Simon
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Sender address rejected: not owned by user

I've a Postfix installation in my SBC running Parabola GNU/Linux-libre (Arch and ALARM-based) plus Dovecot. It works pretty well, and I've set up an account in Thunderbird. The only issue I've found is that when sending emails I get: Sender address…
Megver83
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Postfix not receiving mails from outside the localhost

I've a Postfix + Dovecot set up in my Parabola (Arch based) installation. It looks like it works, I can send emails to any address and it works, and also receive mails but only from local addresses. If I do mail my@domain.org, I get the email (like…
Megver83
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spamassassin + postfix doesn't work without log files

ps aux|grep spamd root 12207 0.0 1.0 159920 83460 ? Ss 17:38 0:01 /usr/sbin/spamd -d --pidfile=/var/run/spamassassin.pid --create-prefs --max-children 5 --helper-home-dir root 12208 0.0 0.9 160484 79996 ? S 17:38 …
Pol Hallen
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clients (imac's) not able to contact 587 submission port

I'm having this weird problem with my imacs not being able to contact postfix. My macbook and iphone work fine, and they are on the same network. Iphone had similar problems for a while, but magically seems to have been solved (i switched to port…
user431710
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How can I block/reject doc, docx containing macro on my mail server?

I'm wondering if it is possible to block/reject emails with .doc or .docx containing macro? Is there any solution for postfix to be used in order to reject this kind of attachments? Today I just received file which is type of ransomware - containing…
user134969
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How to drop registration mail bounces to noreply@ mail address

On CentOS 7 Linux I run Drupal, which requires users to confirm their mail addresses. I have modified the postfix config files in the following way: /etc/postfix/generic: @www.localdomain noreply@preferans.de /etc/postfix/main.cf: smtp_generic_maps…
Alexander Farber
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Postfix matches SASL username and not the FROM mail field with smtpd_sender_login_maps

I have already read hundreds of posts all over the internet and I couldn't find anything that solves my problem. So I decided to write this post and hope somebody can help me. First I want to apologize for my bad English I hope you understand what I…
eliassummer
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Postfix not triggering OpenDKIM milter

I've been trying for a long time to start signing mail sent via postfix with opendkim. Looking at the logs, it looks like zero attempt is made to communicate with postfix: Aug 4 20:59:59 localhost postfix/pickup[49716]: 6430A13EA1C: uid=0…
thisguyheisaguy
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