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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.

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Making sure Postfix MDA and Dovecot IMAP understand mailbox location?

I want to setup Postfix and Dovecot with Postfix as the SMTP MTA (mail transfer agent) and the MDA (mail delivery agent) and Dovecot just as the IMAP server, but I want to make sure that they each understand the mailbox location, and I am not…
user981178
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How to integrate postfix and mimedefang

How do I use MIMEDefang with Postfix to filter email? I don't want to write an SMTPD handler and all the info I can find about MIMEDefang relates to how to use it with Sendmail.
ethrbunny
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Sign outgoing mails automatically with postfix (S/MIME)

I want to sign outgoing mails automatically with postfix. I've found a script and integrated it into postfix. That works mostly like expected, but it has two bugs and I hope you can help me to fix…
user2626702
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Postfix check_policy_service - only checking incoming mail, ignoring internal and outgoing

I'm trying to set up a policyd server on Centos x64 (selinux disabled), which will allow me for limiting numer of messages incoming from different servers and (more important) outgoing from different user accounts. At the moment, i believe i have a…
gds.jerry
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How to control the originating IPv6 of emails sent by postfix?

In a VPS with 2 IPv4 and 16 IPv6, I send emails with postfix. Each time, the email is sent from one of the IPs randomly Received: from domain.com (a random IPv6 out of my 16 IPv6) Thus, SPF fails (of course, softfail), as the originating IP is not…
Googlebot
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Postfix: How to prepend a header only once?

I want to prepend a header with postfix to every outgoing mail from a specific domain. At the moment i use: check_sender_access hash:/etc/postfix/prepend with /etc/postfix/prepend: my.domain PREPEND Header: value this works quite nice, but when i…
allo
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email server: refuse old emails and emails in the future

I use postfix, dovecot 2.1 and amavis for my emails. How can I refuse emails (from other email servers) that date are to old (e.g. >=1 month) or to new (eg. >=1d in the future)?
ChristophLSA
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How can I limit failed sasl2/pam_mysql login retries?

I have Postfix setup serving multiple virtual domains on a CentOS box - and all works as expected. Client's login are authenticated through sasl2 (saslauthd) and pam_mysql. And when a login attempt fails, saslauthd reports "saslauthd: pam_mysql -…
msantos
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Postfix crashing on start-up. Why?

I'm using Debian 6, Postfix 2.9.6 and I want to avoid using MySQL for this, if possible. Here is the appropriate part from main.cf virtual_alias_domains = example1.com example2.com virtual_alias_maps = hash:/etc/postfix/virtual /etc/postfix/virtual…
3ventic
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Manage domain by two mail servers

For some reason (maybe stupid, probably it's about money) I need to setup domain to have two mail servers: some mail addresses would be on Google some mail addresses would be managed by our server I know there is no way how to do it by MX records…
tomis
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Postfix: "hostname x does not resolve to address y" warning even though it does

Postfix log shows lots of these: warning: hostname client.lab.lan does not resolve to address 192.168.1.153 Yet a DNS lookup from the server shows that it does resolve: # nslookup client.lab.lan Server: 192.168.10.242 Address: …
Jochen
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What's wrong here? Postfix secondary MX relay with redirection of specific email addresses

The primary mx server for my domain is down, and is likely to be down for a day or so. Meanwhile pressure is on to get sme high priority mail to people who need it. What I want to do is set up a secondary MX, which will act as a relay for some…
mc0e
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postfix HOLD Recieved non authenticated

i'm wondering if is possibile to put on hold emails that not have authenticated in Recieved header . i've tryed with a simple negate operazione with pcre !/^Received:.*Authenticated*/ HOLD but don't works , nothing is mentioned about negation in…
user147967
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Can't connect to Postfix/Dovecot with Airmail.app but I can with Mail.app (Connection refused?)

So I installed Postfix, Dovecot and MySQL as per this guide: Uses encryption and only SSL and seems like a newbie way of going secure from the beginning, but I have a problem. For an odd reason I am able to use Mail.app on OS X successfully to send…
Lucas Gomez
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Are these nameservers configured properly?

I'm caught in a technical war between two companies. One is a major email hosting organization. The second is a DNS provider called DNSMadeEasy. The problem: An email from an outside domain to a domain inside the email host is intermittently…
tcv
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