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" (content of main.cf) and/or "postconf -M" (content of master.cf)

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0
votes
1answer
197 views

Postfix milter-reject: END-OF-MESSAGE from 4.7.1 Service unavailable - try again later

I am running postfix-2.11 version and recently i have added dkim-milter-2.8 Postfix configuration: # DKIM milter_default_action = accept smtpd_milters = inet:localhost:8892 non_smtpd_milters = ...
4
votes
1answer
53 views

How to handle external alias with dspam as daemon between postfix and dovecot with virtual domains?

I've got the following situation for incoming mail with Postfix 2.9.6, DSpam 3.10.1 and Dovecot 2.1.7: Incoming Mail -> SMTP -> LMTP -> DSpam (as daemon) -> LMTP -> Dovecot I've got ...
0
votes
1answer
80 views

Nagios (OP5) Postfix, Client does not have permissions to send as this sender - but testmail work

I use the Nagios based OP5 monitoring system with postfix. If i send a testmail from OP5 Portal, the message will be received. But if a message is send cause a problem, i would get the error "Client ...
1
vote
1answer
18 views

Postfix deliver mail for orginal destination + BCC - but only for one email

I have postfix with virtual users, I'm looking for solution, tried google it, but no luck. I want to achieve this one: mail for admin@* should be delvered to admin@* and BCC for webmaster@* I ...
1
vote
1answer
28 views

postfix configuration and Received from

Having some trouble here. My server has 3 IP addresses and this is my /etc/hosts: 127.0.0.1 localhost 46.38.235.226 brian.smares.de brian 46.38.238.199 stewie.smares.de stewie 46.38.238.137 ...
0
votes
1answer
21 views

opendkim only signs for 1 zone on a hosted server

I am implementing opendkim but I can only get it to sign for 1 zone. The tld is failing to sign even though it is the same key/signature/file for both domains. my .conf: cat ...
-1
votes
1answer
46 views

Understanding Postfix Mail Log (Part II)

There are several logs like below in my Postfix mail log: Mar 9 06:01:10 postfix/smtpd[23043]: initializing the server-side TLS engine Mar 9 06:01:10 postfix/smtpd[23043]: connect from ...
0
votes
1answer
68 views

Relay denied (454) [closed]

I make test with the website mxtoolbox.com with my smtp and received this error: 220 hostname.example.com ESMTP [702 ms] EHLO MXTB-PWS3.mxtoolbox.com 250-mail.example.com 250-PIPELINING 250-SIZE ...
1
vote
1answer
63 views

Postfix, hostname and /etc/aliases

After having dig for hours on SF/SO and googled a lot, I still can't figure out how /etc/aliases is used by postfix. I use an Amazon Linux EC2 server (kind of Centos6) My server hostname is set to ...
1
vote
1answer
50 views

Postfix + mysql: virtual_users combined with a catch-all in virtual_aliases

I have a Postfix (and Dovecot) server running, using MySQL to define the domain names, users and aliases. This is all running fine, but now I want to add a catch-all to a domain where I already have ...
-1
votes
1answer
110 views

opendkim public key not available [closed]

I'm having problems with my mail server sending or reciving mails from/to hotmail can anyone explain for newbies what all this errors on postfix log/gmail header/website dkim validator are telling me ...
-1
votes
1answer
198 views

535 5.7.8 Error: authentication failed: no mechanism available [duplicate]

I'm using Debian 7, with postfix/courier. When I attempt to login using SMTP I get the following error telnet localhost 25 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 ...
1
vote
1answer
38 views

How to configure postfix to use one virtual alias file per domain?

In Exim I have one file per domain where the filename itself is used to determine the domain for the aliases. For example, I'd have a file named example.org with contents like this: foo: ...
0
votes
2answers
93 views

POSTFIX: mail are sent randomly

I am trying to set up a mail server following the following tutorial: https://www.linode.com/docs/email/postfix/email-with-postfix-dovecot-and-mysql#sph_dovecot I already set up a mail server using ...
0
votes
1answer
56 views

Postfix - mail forwarding not ok - rejected by the server for domain example.com by subdomain mail.example.com

Some information: example.com has a MX-record with priority 10,20 and 30 to mail.example.com mail.example.com has an A-record to 192.0.2.0 (fictional ip) This is my main.cf of postfix #See ...
5
votes
1answer
197 views

How do I get disabling SMTP plaintext authentication to stick on OS X 10.10 Yosemite's Server.app

I've got an SMTP relay server that I recently replaced with OS X 10.10 Yosemite running Server.app. It is running as an SMTP-only relay allowing only hosts from the LAN to relay out through it. We do ...
0
votes
1answer
129 views

Zimbra - Domain on different IP address

What I'm trying to do is to set zimbra properly. I'm using on my server multiple domains. All on one IP address. But for one new domain, I want it to be visible differently. What I want to achieve is ...
1
vote
1answer
78 views

postfix header_checks - regex spanning multiple lines

I would like to create a spam filter that spans multiple lines in headers. This is my /etc/postfix/header_checks file: /^From:.*name[0-9]+@.+[\r\n]+To:.*name@domain\.com/ REJECT It's a valid ...
0
votes
0answers
20 views

Is “Received: from hostname (localhost [127.0.0.1])” triggering spam filters? [duplicate]

I am running my own postfix Mail Server. All my mails are Spam filtered (at least by Gmail and Yahoo). I don't really know why they are filtered, because I have implemented SPF, DKIM and DMARC. ...
2
votes
1answer
79 views

check header for Authenticated sender in postfix

My users send email with SMTP AUTH via SASL Authentification. Unfortunately their mails would marked as NoBounceOpenRelay by Amavis. So I set this to postfix main.cf smtpd_sasl_authenticated_header ...
0
votes
1answer
206 views

SMTP Error (451): Failed to add recipient. Temporary lookup failure

Installed iRedMail on Debian Server Can Login to Roundcube Sending Mails from Roundcube results in the following error: SMTP Error (451): Failed to add recipient "XXX@mydomain.de". Temporary ...
1
vote
1answer
33 views

helo message set to local hostname

I have a droplet on DigitalOcean and decided to implement my own mail server there using postfix and dovecot. Everything worked correctly and I was able to send and receive emails via a mail client ...
1
vote
1answer
51 views

Unable to send email from a ec2 instance using postfix

I find that I did not receive email for a while. When I checked the log I see error messages like this: 1 Mar 7 03:37:32 ip-179-45-37-216 postfix/smtpd[24969]: connect from localhost[127.0.0.1] ...
0
votes
0answers
64 views

Hotmail SMTP cache?

So this is an odd one ... Does Hotmail in anyway resolve and cache information for MX records or A records for individual email addresses? For Example: I setup a personal test bed mail server and ...
1
vote
1answer
44 views

Postfix: How to make complex attachment filtering?

I have Postfix on our server. I need to filter attachments in incoming mail not only by it type, but also check what inside of it. Exactly by now I need to filter attachment that: is a .zip archive ...
0
votes
2answers
51 views

Protocol between MTA, MDA, and mailbox in Postfix

I've read that LMTP is used to manage local messages with no need of queues. What I don't understand exactly it's how what protocols are involved and then, so please correct me if I'm wrong: Let's ...
1
vote
1answer
92 views

Block attachment files without extensions in Postfix via mime_header_checks?

We know how to reject executables and other potentially dangerous file extensions via mime_header_checks directive: mime_header_checks = regexp:/etc/postfix/mime_header_checks (main.cf) ...
1
vote
2answers
352 views

GitLab not sending mails

I have a Linux Ubuntu 14.04 installed on my VM. Recently I have installed GitLab 7.8.2 using the instructions on GitLab site, and encountered problems in making Gitlab to send mails. for example, ...
0
votes
1answer
37 views

Postfix mydestination trouble

UPDATE: I solved this by setting myorigin to $myhostname ("prime.example.com"). Now system mail goes to "user@prime.example.com", which is what I wanted. My app explicitly says it wants to send ...
-1
votes
1answer
57 views

postfix apparently relay email

I have read as many documents as I could understand about tuning postfix main.cf parameters, but still get some external email relayed. Here is a typical example in /var/log/mail.log: Mar 6 06:26:13 ...
0
votes
2answers
170 views

Postix or Dovecot debug log for Maildir folder, Virtual user mail folder owner and permission

I'm no able to find a complete tutorial about Maildir and the folders where reside owner and permissions if there's any and you already found it , please share. Anyway I wonder if there is a way to ...
0
votes
1answer
55 views

Recomendations for this mail server setup?

EMAIL SERVER SETUP Hey, its my first time using serverfault but I hope the community can help. I am trying to build a secure email system using Linux, Postfix, Dovecot and MySQL. I have read on ...
0
votes
2answers
155 views

email sending speed - how to improve

I am maintaining a server to send email mailings (no spam, of course). The current speed of this machine is approx. 2000 emails per hour. (edit: actually I did a test mailing today, removing the ...
4
votes
1answer
171 views

how do I set up two smtp ports for postfix?

A CentOS 7 server with postfix, dovecot, and mailx needs to accommodate mail being sent through port 465 and received through port 25. What specific syntax and files need to be changed in order to ...
1
vote
1answer
89 views

Understanding Postfix Mail Log

Recently I checked my mail log and found a lot of messages like this (some cipher text have been truncated): Feb 23 11:57:42 postfix/smtpd[32451]: initializing the server-side TLS engine Feb 23 ...
1
vote
1answer
116 views

Increase timeout for Postfix/Cyrus “Command time limit exceeded”?

I have an old OS X Server 10.4.x running Postfix 2.1.5 which is configured to use cyrus as mailbox transport. Here's postconf -n: # postconf -n alias_maps = ...
1
vote
1answer
39 views

If I create a virtual email alias that forwards a lot of spam email, is my IP at risk of blacklisting or the originating IP address? [duplicate]

A scenario of this would be something like a domain called domain.com has a mailserver set up that forwards all email sent to info@domain.com to person@gmail.com. If someone sends a lot of spam to ...
0
votes
2answers
97 views

postfix mails (works) to all but my domain on debian

I have set up a redmine server that I got from turnkey linux. Mail more-or-less works out of the box. I can mail to anyone that is not in my domain. Let me explain: If I run the mail command from ...
1
vote
1answer
61 views

Allowing Postfix Relaying For Certain Hosts [duplicate]

I have Postfix setup in a test environment, segregated from our LAN, and relaying for hosts in the test environment. Originally, I had all outbound email funneling through procmail and into a single ...
1
vote
0answers
28 views

Applying filter on mail from specific subnet in postfix [duplicate]

I'm trying to get the following to work: We have a postfix relay on the edge of our network, accepting all mail from our internal LAN & DMZ. What we are trying to get to work is limiting the ...
0
votes
0answers
35 views

Exchange with Postfix MX for technical accounts in same DOMAIN

I have organization configured with Exchange 2007 server with many technical accounts. I would like to migrate technical account to Postfix server with same domain At the moment my structure is: ...
0
votes
1answer
35 views

opendkim to sign all '*' users in a domain

How do you get opendkim to sign for all users in a domain? *@exmailer.com exmailmap in the signing table is not working for me. error: opendkim[1565]: 573D4A0D3D: no signing table match for ...
4
votes
1answer
62 views

Roundcube sends e-mails without subject

I have recently set up a mail server that consists of postfix and dovecot. Yesterday I added nginx and roundcube to the mix. SPF, DKIM, DMARC, rDNS records are all done. Gmail treats my mail as valid ...
6
votes
1answer
67 views

postfix performance with lists in main.cf

For defining a list of items to assign to many different options in postfix, you can either use a comma separated list like this: relay_domains = example.com,example.net,example.org or a hash map ...
0
votes
1answer
73 views

CentOS email setup for Wordpress

I am moving an old Wordpress install to a new CentOS LEMP stack VPS. I want to set up email for the new VPS. It came with sendmail installed by default but I find it to be overkill. I just need a ...
1
vote
0answers
59 views

Postfix not following MX, local delivery LDAP

Before explaining the problem, this is the setup: We run 5 servers, 2 in Montevideo [Uruguay], 3 in the US, on each server we have clients (domains, mail accounts, and obviously local logins) the LDAP ...
-1
votes
2answers
111 views

Postfix, I'm receiving a lot of undelivered mails (logs inside)

Some days I receive a lot of Undelivered emails, it's like my server is used as relay. But I don't know if that's only backscatter emails or my server is really used as a relay. Here is what I found ...
1
vote
1answer
69 views

Postfix [Courier, Maildir] Disable Quota

I set up Postfix under Debian Wheezy with MySQL and virtual users using this tutorial. Thunderbird is recently giving me alerts "You exceeded your mail quota" and saving/moving emails is denied. The ...
1
vote
1answer
87 views

Postfix - relay locally generated mail but accept mail incoming from GApps for the same domain

I know the way to disable all local delivery is to remove the domain from "mydestination", which will cause all mail to be relayed through whatever relay I setup. But I want postfix to accept all mail ...
0
votes
1answer
165 views

Dovecot / Postfix / SASL: Connect to /var/run/dovecot/auth-client failed: Permission denied

Dovecot / Postfix configuration is not working properly on my server : after several checks, I understand that Imap services are operationnal using local or desktop clients Postfix is listening, ...