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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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Postfix SMTP server gets "550 Requested mail action not taken: Invalid IP"

I have a SMTP server named smtp-ca.mdpi.com and when sending emails to some specific chinese email domains, I am getting back: 550 Requested mail action not taken: Invalid IP<64.15.147.140> (in reply to end of DATA command)) I have an SPF set in…
Milos Cuculovic
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Postfix and "local mail"

That's the first time I'll configure a mail server. I explain you the complete picture. Currently, my company company.com has an old-win-2008-server-with-no-way-to-know-its-current-configuration-because-everything-is-pure-chaos, and we are migrating…
ABu
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Why does postfix on AWS give me "Invalid MAIL FROM address provided"? I have production access

I'm running the postfix mail server on my AWS box. My domain is mydomain.com. I have set up virtual mapping such that emails sent myuser@mydomain.com should be forwarded to target-user@gmail.com.com. I have used Amazon SES to verify certain email…
trex
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Scalable Multi Server E-mail setup using Linux/Dovecot

One of my clients ask me to set-up a multi server, scalable email system. I can configure multiple servers to send emails. By using PHP Mysql based login script, users will be redirected to each email server with a login cookie. Domain SPF has all…
M_R_K
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smtpd: warning: hostname example.com does not resolve to address 203.0.113.1

One postfix instance at sub.example.com is pushing mail to example.com via LAN, which is both a mail server and a router: Internet | | 203.0.113.1 (127.0.1.1 in /etc/hosts) 192.168.1.1 | | 192.168.1.99 Every time a…
anx
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Postfix to Postfix relaying

I've got a (possibly unusual) situation with using Postfix to relay mail to another Postfix mail server that then needs to send the email out. I've read plenty of tutorials and seen instructions for using Postfix as an email relay to send to an…
Bob Hawthorne
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Postfix illegal address syntax

My postfix install is set up to forward all email going to example.com to my other mail server at mail.example.net. This works fine for all addresses except !@example.com -- the example.com server spits out Illegal address syntax from in the logs…
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Why can't I send/receive emails from AWS Ubuntu using Postfix?

I'm trying to send/receive emails on my AWS Ubuntu box. To do so, I'm following the instructions posted by Amazon here. (I skipped the section entitled "To configure integration using a secure tunnel") However, I'm still unable to send any emails.…
Saqib Ali
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Mails from relay server fails spf

An email sent by a server administered by me bounced back saying it failed the SPF check. Looking at the bounce message it had an IP different to that of the server sending the email. Then I found that the message which was bounced was actually sent…
eranga
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Automatically defer certain messages in Postfix

Recently we've had a spate of "spear-phishing" attacks that many of our users have fallen for, and as a result our automated scripts are running at full steam locking accounts that have been compromised and are sending out spam. This morning I spent…
Kromey
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Postfix/Dove copy incoming outgoing emails

I have to copy a mail account's incoming and sent mails to another mail account on the same server as well. How can I do this? The server is a debian wheezy running dovecot, roundcube and postfix. As I said the email isn't just an alias but an…
snowlinux
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SASL authentication failure: Password verification failed (postfix + cyrus + saslauthd)

We're having difficulties authenticating over smtp, running postfix + cyrus on centos 7. When I try to telnet to port 25 (or 587) locally and auth plain, I get the following errors in the mail log: Sep 25 10:25:00 blabla postfix/smtpd[3858]:…
sdragnev
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How postfix support multiple mail domain redirect?

I'am config the postfix server to receive inbound mail. there is need to support two domain in one server. but I found I can not make it right. /etc/mailname a.com postconf -n alias_database = hash:/etc/aliases alias_maps =…
hfcorriez
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Spamassassin filter systematically produces negative (ham) scores for spam messages

I have problem with lots of spam. My server setup is VPS with CentOS 6.5 and Dovecot+Postfix+Spamassassin. Here is source of one of the messages: Return-Path: X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on…
FHR
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How to make postfix to deliver via a command

I have setup a postfix server that will receive several emails and deliver them to OpenERP. It's currently working, but I would like to improve the overall schema so that postfix delivers (i.e Delivered-To) to the OpenERP email alias. More details…
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