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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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Postfix: always_bcc all but one domains

There are two mail domains on two Postfix servers, let's say a.com on server1.com and b.com on server2.com. Users and aliases are stored in an Active Directory, which we access by using the ldap module. A copy of all mail to user@a.com on server1…
mgabriel
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Many authentication failed logins for "good" users

I have recently notice that my server was reporting at mail.log a lot of bad authentications for know users, and its not a brute force attack. And i really dont know the cause of such authentications. I have users using, Gmail App, Mail at IOS, Mail…
marafado88
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postfix/proxymap: request for unapproved table

I get this in my maillog Jan 14 13:48:58 ovz postfix/proxymap[25328]: warning: request for unapproved table: "btree:/var/lib/postfix/postscreen_cache btree:/var/lib/postfix/postscreen_cache hostkarma.junkemailfilter.com=127.0.1.2*1 …
Lenne
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Postfix Relay Based on Sender Recepient

What is the best practice when one has to implement this sort of ruleset in postfix: Email sent from local domain1.com, domain2.com to example.com, example1.com ought to be relayed to smtp.external.com. Email sent to everyone else example.com and…
Contertulio
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How to use old md5 password hashes on courier/postfix

I've recently installed courier/postfix with virtual users and domains and i want to move mailboxes from an old server. The problem is that the old server used to use md5 password hashes in the database and current server uses mysql's encrypt().…
Marius
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Postfix (SASL) / MySQL: Use MD5 Encryption?

Is it possible to use MD5 password encryption to encrypt passwords when using Postfix / SASL and MySQL? Currently, my setup is using the MySQL CRYPT() function, which for various reasons isn't ideal.
mO_odRing
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Finding script trying send spam via postfix

I have had this problem before with crap wordpress sites on my server but it was always easy to find the source, a php script by looking at the spam header and see the php scripts name. But this time I got something different. The spam isn't being…
Saffer
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Way to know which user moved the letter to the folder

Dovecot 2.2 + Postfix 2.1 Public folder namespace: location = maildir:/domain/public:CONTROL=~/Maildir/control/public:INDEX=~/Maildir/index/public I have a public folder "sales" for group of users. All messages that are sent to sales@domain.com…
shallrise
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IMAP/POP3 with Dovecot & Postfix: Authentication Failed

Says it all in the title. To give you some background, I'm a programmer. I'm not into installing mail servers as a hobby, and I'm having to make one because the project I'm creating will need to use a webmail type service (like roundcube, or my own…
Logan Butler
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postfix virtual map regular expression

I am trying to create a small virtual_alias_maps fiel for postfix-pcre: .*@subdom\.domain\.com test@other.org But I get this error: warning: pcre map /etc/postfix/virtual, line 1: unknown regexp option "c": skipping this rule Where is the error?
user219962
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Intermediate certificate for Let's Encrypt

I have set up Let's Encrypt encryption on my server, and thereafter a tutorial to set up a mail server (dovecot and postfix) on the same server (ubuntu server 16.04 with nginx). In the process I also created two email addresses for that domain, that…
user3026192
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Postfix before-queue spam reject with amavis without sending out a bounce on OS X Server

This is a stock OS X 5.2 Server mail configuration which I'm trying to change to make it reject a spam message with a "554 5.7.0 Reject" before accepting it without sending out any additional non-delivery notifications to the sender. It's configured…
Захар Joe
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CentOS: what is blocking the port?

I am rather new to Linux and trying to set up a MailScanner box. I went as far as to set it up with postfix and succeeded sending a test message via it from the local console. However, when I try to connect to port 25 on the box IP which is…
kdl
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Postfix sometimes "connection refused" when SMTP'ing

I'm facing a weird problem with Postfix right now. My setup is Postfix 2.9.6 and Dovecot 2.1.7 on Debian 7.11 and there's a second server configured exactly the same that does not show this problem. Sometimes I get a "connection refused" when…
Stimpy
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Postfix doesn't send email, only receive

I recently install on my Debian Server the PostFix + Dovecot + Mysql, everything works fine, but I cant send email, I receive the error on the log NOQUEUE: reject: RCPT from unknown[##.4.##.41]: 454 4.7.1 <#####@icloud.com>: Relay access denied;…
Pedro Soares
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