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
0answers
33 views

Relay email from a specific user through SMTP in Postfix

This is a very simple question and sorry if it is obvious/already answered. I have a mail server that I use to send mail from my primary domain. I have it set up just how I want it with TLS only, ...
0
votes
0answers
89 views

DKIM, SPF, DMARC, SPF OK mails are flagged as SPAM

I have a dedicated server running CentOS7 with Postfix, the problem is that all the sent mails are flagged as SPAM by hotmail and gmail despite DKIM, SPF, DomainKeys, DMARC records and keys wich are ...
0
votes
1answer
24 views

Postfix rejecting inbound mail to virtual mailboxes

I followed this tutorial to setup an email server that uses virtual users. https://www.rosehosting.com/blog/mailserver-with-virtual-users-and-domains-using-postfix-and-dovecot-on-a-centos-6-vps/ I am ...
0
votes
0answers
30 views

postfix whitelist all incoming mail with a specific domain destination

Would it be possible to whitelist all incoming mails with a specific recipient domain. I have multiple domains running on my mailserver. I want to simply push thru all the incoming mails with a ...
-3
votes
1answer
36 views

Postfix: How to secure port 25? [duplicate]

How can I secure port 25 in postfix/dovecot? Right now, I can send internal email through telnet without login. For example: telnet mydomain.com 25 MAIL FROM:<me@mydomain.com> 250 2.1.0 Ok RCPT ...
1
vote
1answer
98 views

Postfix SSL-Intermediate-CA

I got a thawte Wildcard SSL-Cert for for *.my.example.com. Now I would like to use it for my mailserver (hostname: test.my.example.com). I edited the /etc/postfix/postfix_default.pem and included ...
2
votes
1answer
92 views

Validate email address at my own domain with gmail

I need to have the ability to send email using gmail's web interface, but have them appear to originate from my own domain instead of originating at a gmail address. In order to do this, gmail asks ...
0
votes
0answers
28 views

Postfix + Dovecot - Internal Relay

I have a postfix/dovecot mail server setup. Mail is working perfectly. External relays are disabled. The issue is external servers can telnet to smtp 25 and spoof email from any valid domains hosted ...
0
votes
3answers
61 views

Postfix not working with user@example.com type user

I have some virtualhost set up on Centos 7.1, I want to have user like user@example.com so that I can reply via user@example.com and not like user@localhost.localdomain Postfix is working with user ...
1
vote
2answers
149 views

Firewall rule to only allow Postfix to send email through SMTP on port 25

As suggested in How do you detect a spambot on your network? how can I setup firewall rule to allow only Postifx to send emails using SMTP on port 25 and disallow all other applications to send on ...
1
vote
2answers
65 views

Postfix config for virtual aliases and sasldb

I'm trying to set-up postfix to handle several domains as aliases, with an SMTP server accepting incoming mails from these domains with sasldb authentication. The documentation looks quite old, and ...
0
votes
1answer
52 views

SMTP not reachable

for some time now I am not able to reach SMTP on port 25 or 587 on a server of mine from the outside though both ports are open and postfix is listening on them: $ telnet domain.tld 25 Telnet escape ...
3
votes
1answer
62 views

Are rejection messages stored anywhere on a postfix server?

I am working, with very limited experience, to recover messages that were sent to an address on a postfix email server that had been forwarded to a bad address. So the messages were rejected, but were ...
2
votes
4answers
386 views

False IP blacklisting on CBL and Spamhaus ZEN

I've gone thru this: Spamhaus XBL keeps adding my IP I'm managing the server 23.239.30.81 on Ubuntu using Postfix. Since last 6 months or so I started forwarding all my: Cron Daemon logs ...
0
votes
1answer
170 views

SPF, DKIM, DMARC, DomainKeys OK, emails flagged as SPAM [closed]

I have a new dedicated server running CentOS7 with Plesk 12.5 with postfix, and i have succesfully set SPF, DKIM, DMARC and DomainKeys as it shows this test from port25.com: ...
1
vote
1answer
146 views

Email, forwarded by procmail, rejected by Gmail

EDIT Let's ignore for a while all that I have written below and refrase the question: If you have your own domain name and you want to get email for that domain into your Gmail inbox (not Google ...
0
votes
0answers
21 views

Postfix local reject message for valid user

I'm having a problem with postfix which is randomly rejecting mail to valid local users. Users are in a local openLDAP server, but configured as local users. I can't reproduce the problem, it look ...
2
votes
2answers
41 views

Can't find mail configuration data on old server

I'm working on a server with some very old mail configurations that have recently started getting some difficulties. I decided to just redo the configuration from scratch since there's a lot of ...
0
votes
0answers
12 views

Postfix can't send email reporting mail “Exceeded Mail Size Limit” [duplicate]

The errors: Nov 30 04:58:26 serverm postfix/anvil[32747]: statistics: max connection rate 1/60s for (smtp:*.*.*.*) at Nov 30 04:48:26 Nov 30 04:58:26 serverm postfix/anvil[32747]: statistics: max ...
0
votes
1answer
196 views

Postfix error sending an email via “Gmail” account [closed]

I am trying to send an email via my personal "Gmail" account to other "Gmail" account using Fedora 23. The idea is to send an Email ( for server alarms ) via Postfix, but I don't have corporate / ...
0
votes
0answers
22 views

postfix - Rewriting address from maps before applying restrictions

I use Postfix and Dovecot on my server. I have quota plugin to my Dovecot applied so I have created service which provides information about quota to Postfix. My smtpd_recipient_restricions are: ...
0
votes
1answer
23 views

How to prevent postfix rewriting recipient email addresses?

I've setup a postfix server which appears to be running fine. foo.com is its primary domain, bar.com is a secondary domain which used solely as another name/alias for foo.com. I have the following ...
0
votes
1answer
60 views

How to pass through credentials in SMTP proxy with Postfix

I want Postfix to proxy SMTP connections from MUA on my client to another outer SMTP server. Since the outer SMTP server requires the Postfix proxy to authenticate with SMTP-AUTH, So I set my MUA's ...
0
votes
1answer
33 views

Postfix: find out why mail bounces

My otherwise pretty well working postfix mail server is refusing to deliver a single mail with attachment. Unfortunately i don't have the error message available which was sent to the sender. But here ...
0
votes
1answer
219 views

Postfix header_checks not working

I just can't seem to figure out why header_checks are not being evaluated. I add following line to /etc/postfix/main.cf: header_checks = pcre:/etc/postfix/header_checks.pcre And here is ...
-1
votes
1answer
86 views

Postfix cant recieve mail from external source centos 7

I am using postfix, dovecot, squirrelmail for mail server everything is working fine except I can't receive mail from external source. I can send mails to local and external source. I am following ...
0
votes
1answer
165 views

“SASL authentication failed” when authenticating to receiving mail server

Some recipients do not receive emails from my Postfix 2.11.0 server. Their servers reject my SASL connections with errors like 535 5.7.8 Error: authentication failed: authentication failure and 535 ...
0
votes
0answers
43 views

postfix / php mail() on ubuntu 14.04: no mail sent, no trace in log

Setup: Ubuntu 14.04 postfix 2.11.0 php 5.6.15 Php's mail() function does not send out emails on my VPS and no issue appears on the log. My test script is very basic: <?php ...
0
votes
1answer
24 views

map a valid email adress to localhost user

I developp locally (ubuntu 15.04 with LAMP) websites and I need to test that a website is really sending emails. I cannot figure out if it is possible to say that if the email is toto@toto.com, the ...
0
votes
1answer
77 views

Users allowed to send mail using postfix

I've installed postfix and opendkim on my ubuntu server, intending to use this server as a private relay for an application to send "activation" emails to new users. I configured SASL authentication ...
1
vote
0answers
19 views

Authnetication failure with postfix and sasl using sasldb

I'm really not sure what my issue is. I've checked several guides, and I am sure I have set this up correctly, including config fails, restarting the service, permissions etc. OS is Ubuntu Server. ...
-2
votes
1answer
227 views

Ubuntu + Postfix: Mail Log Missing [duplicate]

I've just installed postfix on my ubuntu server and am trying to debug why outgoing mails are not being sent. This led me to notice that the /var/log/mail.log file is missing. For that matter, there's ...
-2
votes
2answers
148 views

Postfix configuration in Ubuntu is not sendin e-mail to Yahoo

Is the first time that I configure a Postfix Mail service in Ubuntu. The situation I'm facing is that recover password e-mails are being sent to G-mail accounts, but no e-mails are being sent to Yahoo ...
0
votes
1answer
84 views

Postfix Server for Mass Mailing on Multiple Domains

I'm currently setting up a mail server for mass mailing on a non-profit. I decided to go with Postfix since I had some experience with the configuration. However my experience was for multi domain ...
0
votes
1answer
21 views

Mail server and custom incoming logger/filter/agent

I have to write an application and link it to a new postfix or exim4 mail server, this application must fully read and process all incoming messages. As optional requirement it may filter some ...
0
votes
1answer
29 views

Postfix still forwarding emails even after I've removed the address from all configuration files

I'm having a strange problem that can only be explained by caching or some kind of hidden variables. I was forwarding mail to my gmail account with a virtual alias file, /etc/postfix/virtual. I ...
10
votes
2answers
494 views

crontab sends month-old emails

ubuntu 14.04 Mailserver: Postfix root receives dozen of emails from crontab. These mails contain PHP warnings. I've fixed the cause for these warnings. I've fixed every cronjobs to not send emails ...
3
votes
0answers
45 views

I need help trying to authenticate with AD from my linux machine

I am not experienced in this, so there might be some points that I am missing. Initially I tried to setup Cyrus Mail w/ SASL for AD authentication. After several tries, it failed to work. I switched ...
1
vote
0answers
61 views

Postfix cannot start but dovecot is ok

My postfix service cannot start. Here is message: Job for postfix.service failed. See 'systemctl status postfix.service' and 'journalctl -xn' for details. And here is service status: ...
0
votes
1answer
288 views

Postfix/Dovecot multiple authentication against Active Directory

So I have working mail server which authenticates against active directory. Everything works fine until I try to add a secondary authentication backend.. Server info: Server OS: CentOS 7.1.1503 ...
-1
votes
1answer
48 views

How to improve spam protection using postfix? [duplicate]

I try to improve the spam protection of my postfix install for several weeks now, but I still receive spam. What I've done so far: Added SpamAssassin Added SPF record Tuned rejection rules Now ...
0
votes
0answers
35 views

Identical VMs behave differently

I have 2 Centos 6.7 OpenVZ VPS'. I have copied the entire disk image from the first one (server1) to the second one (server2). Now I have a couple of issues with server1 that I don't have with ...
0
votes
1answer
37 views

Postfix to SMTP Relaying

I have a few VPS' with Postfix installed on them however I have an issue where the email do not get through to Outlook.com. My temporary solution / workaround was to just buy a shared hosting package ...
2
votes
0answers
80 views

Configure Postfix to route to specific IP based on the recipient MX record

I have Postfix running on a VPS with Ubuntu 12.04, the server has multiple IP addresses. I want to configure Postfix so that it will route mail to send via one of these IP's based on the MX record of ...
3
votes
1answer
50 views

Early mail rejection with Mailman in Postfix

I have a Postfix installation on a single machine which is the sole final mail destination for: The hostname of the machine (mail.example.org) and localhost Mailman lists on lists.example.org A ...
4
votes
2answers
49 views

Is it OK to run my own mail server for email forwarding? [closed]

A lot of people advise against running your own mail server; they recommend using a SAS that is more experienced in this area (Google Apps Gmail, AWS WorkMail, etc). I want to run Postfix MTA to ...
-1
votes
1answer
16 views

Mail aliases from SQL DB not working, but recipients from SQL DB *are*

I am using Postfix 3.0.2, Dovecot 2.2.18, and MariaDB 10.0.21. Postfix/Dovecot are receiving mail for *@mydomain.com and *@anotherdomain.com (i.e. the MX for both domains are set to this server.) I'm ...
0
votes
1answer
28 views

How is the maildir for each user supposed to be created?

I've installed postfix+dovecot under ubuntu and got permission errors when receiving mail: Nov 10 22:04:08 amalthea postfix/local[14942]: warning: maildir access problem for UID/GID=9999/9999: create ...
0
votes
0answers
82 views

Using postfix to send email in redmine

I'm trying to configure sendmail to send emails from the Redmine installation (which I still haven't figured out how to run with Apache). When I send mails from the terminal, with the command ...
1
vote
1answer
98 views

OpenDKIM not signing outgoing mail

I'm trying to setup OpenDKIM on my mailserver running Debian and Postfix. This is the configuration I've done: Generated two keys (for two domains I need to send mail for) Configured KeyTable, ...