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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2
votes
1answer
137 views

Limit concurrent connections to Postfix server

I'm having trouble limiting the number of concurrent connections from the same client to my Postfix server. Limiting the maximal number of concurrent processes, from the same or different clients, is ...
4
votes
1answer
208 views

How to block attachments on incoming mails only using Postfix?

I have a mail server (CentOS 6.5) running Postfix and Dovecot Postfix is listening on port 25 for inbound mail and 587 for outbound mail The problem is outbound mail with pdf attachments are being ...
0
votes
1answer
55 views

Postfix check hosted sender domain [closed]

On my server I have this problem: there are mails sent from, example, johndoe@domain.com even if domain.com isn't hosted on my server. And, obviously, there is no johndoe@domain.com among the e-mail ...
0
votes
1answer
66 views

configuring .mailrc for multiple Maildir users

In a CentOS 7 server with postfix and mailx, my ~/.mailrc file contains: set MAIL=/root/Maildir set folder=mail This enables mail from the root user's Maildir to be reviewed when the root user ...
0
votes
0answers
16 views

Rogue PHP Script recreating itself and sending emails [duplicate]

I have been struggling with this issue for many months now. The primary issue is that every day or every other day, a new php script springs up into our Apache server (built on CentOS 6) and the ...
1
vote
1answer
48 views

Set postfix to relay email from a network interface

I'm running postfix on a system that has several external interfaces and several internal interface, and I want postfix to accept email for local delivery from the external interfaces and accept email ...
2
votes
1answer
298 views

cannot find postfix/mailx email in maildir, why not?

In a CentOS 7 development machine, I have configured postfix to allow emails to be traded between localhost addresses. Mailx is also installed. I am able to send email, and the log files indicate ...
1
vote
1answer
36 views

Postfix pipe mail at user level

I am trying to filter mail at the user level. I have CentOS and Postfix installed. I managed to install a filter on the server and its working great, except, instead of filtering by user, all emails ...
-3
votes
3answers
77 views

Ubuntu Mail Server: create default mail folders [closed]

Now I have the mail server working IMAP mode. I'm interested in configure the mail server in order to set default mail folders (like Inbox, Trash and Sent folders) per mail account. Is there a way or ...
2
votes
1answer
41 views

Where does DSPAM fit into the chain

Is there any postfix guru here who knows that after a mail gets into postfix what's the order it gets forwarded between the internal filters and components? As I figured: 1, Postscreen 2, Recipient ...
1
vote
2answers
144 views

Postfix & Amavis - Use UNIX Soket for Communication

I currently using a complex mailserver setup using Postfix, Dovecot, Amavis and Spamassassin. Everything works fine but I want to improve the Postfix-Amavis-Communication. At the moment, postfix will ...
1
vote
1answer
68 views

per-user transport with postfixadmin

We have a traditional postfix/dovecot/postfixadmin setup for mail delivery and imap access. We would like to use a mixed setup with Google Apps in the future, and use their mail service for the major ...
1
vote
1answer
35 views

Set inet_interfaces for each postfix service

I have a complex postfix setup with dovecot authentication, amavis and spamassassin. The inet_interfaces are set to my IPv4 address, IPv6 address and IPv4 and IPv6 loopback. But I want that the ...
1
vote
1answer
72 views

Block sender after sending to n non-existent email addresses

I have a domain that I use for my email. There are a couple of actual email addresses there, and everything else goes to a catchall. I use the catchall so I can create email addresses on-the-fly, like ...
1
vote
1answer
238 views

postfix error looking up passwd info (catch-all)

In postfix I'm trying to setup a catch-all address for unknown local accounts. Any mail that can be delivered to a local user should be delivered to their local mailbox (and respect any aliases in ...
1
vote
2answers
70 views

should multiple servers each run a full postfix stack, or use one central mail server

I have a collection of servers that will each have their own tasks. web server, billing server, game servers. Each of which will need to either send customer facing email, or simply send it's system ...
1
vote
2answers
492 views

Postfix - Dovecot - Can Send Emails But Wont Receive - NOQUEUE - Relay Access Denied

I have set up a mail server on ubuntu. Ive checked ports are open and I've double checked all config files, checking with every google search result I could find. Most of the similar posts have more ...
3
votes
1answer
88 views

Relay email for some addresses, forward for others with Postfix

I administer a domain (let's say example.com) for a client who uses an Exchange server at an external service provider for email. So I made the MX record point to the Exchange server, let's say ...
5
votes
1answer
1k views

Roundcube & Postfix SMTP: SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca:s3_pkt.c

I have a Postfix / Dovecot / Roundcube setup that I use personally, as well as provide to other users. I am attempting to transfer this entire setup to a new box, but having some issues. Mail ...
3
votes
2answers
57 views

Possible to configure postgrey to only graylist .com addresses?

Is it possible to configure Postgrey to only graylist .com addresses? e.g. essentially whitelist anything that comes from .edu, .org, .net, etc.? 98% of our spam comes from .com e-mail addresses, ...
0
votes
1answer
69 views

Multiple smtp servers postfix - one mail domain

How can I separate mail server into multiple physical machines using postfix? I wish that some users were on one server and some on the other and that there were no problems with the verses 5xx. I ...
1
vote
1answer
52 views

postfix quota postmaster daily mail

I've got an server with Postfix/Courier and Quota. Now I receive a daily update from quota. 2 questions: Where do I disable this daily update as it's always a blank email: DAILY QUOTA REPORT: ...
-2
votes
2answers
142 views

I can't recive emails and all outgoing emails go to spam folder [closed]

I recently bought a VPS server at OVH.com to host the web of one of our business and I'm having problems to correctly configure the DNS to be able to send and recive emails. Right now i can't send ...
0
votes
1answer
69 views

Getting error TLS not available when connect via StartTLS

I am trying to configure TLS on my mail server (postfix+dovecot on debian). But whenever I try to send via StartTLS, I've got this error message telnet localhost 25 Trying ::1... Connected to ...
7
votes
1answer
335 views

GMail bouncing mail sent over IPv6, IPv4 working

I have trouble sending email to GMail addresses using IPv6 from my domain camgirltools.net If IPv4 is used, everything works as intended, the mail is delivered. When using IPv6 to send mail to GMail ...
0
votes
2answers
511 views

postfix fails to send mail with “fatal: unknown service: smtp/tcp”

I have installed postfix, and when I tried to send a mail to gmail it told me that it has been sent, but when I checked my inbox in Gmail I didn't saw it. This is how the connection looked like: $ ...
3
votes
1answer
249 views

Postfix with Dovecot: local and virtual users

I just finished setting up a Postfix SMTP and Dovecot IMAP/POP3 server. It works perfectly fine for virtual users both sending and receiving, but I need to do the following: Besides virtual users ...
1
vote
1answer
172 views

Maildir “new” has messages but Inbox is empty

I'm installing a new mail server (Postfix/Dovecot+Maildir) in a fresh OS. Using Thunderbird (or Squirrelmail) I can send mails but my inbox is empty even when I can see them in ...
1
vote
0answers
162 views

mail command no longer reads from /var/spool/mail/root [closed]

Until half an hour ago mail command worked as expected. Now it says no mail for root. But I can still see and read my mail in /var/spool/mail/root. I don't believe I've changed any settings. I'm ...
2
votes
1answer
111 views

Dovecot Sieve allows spoofing through LMTP

I have set up Postfix to block spoofing your email (you can only send emails as yourself): smtpd_sender_restrictions = reject_authenticated_sender_login_mismatch I have set up Sieve and ...
0
votes
1answer
66 views

postfix/policyd-weight[11026]: warning: child: could not open RBL Lookup Socket to config

i have some problems with my postfix server. Here the error message from my mail.warn: Dec 24 14:43:36 serv postfix/policyd-weight[23064]: warning: child: could not open RBL Lookup Socket to config: ...
2
votes
1answer
595 views

Installation of Postfix and Dovecot Mail Server on Ubuntu and Postfix will not start

Information on the Mail Server Installation Process Followed... Hello I have a server with DigitalOcean that I am trying to install an email server on so I can add and manage email accounts. This is ...
0
votes
1answer
76 views

Postfix configure a gateway to outbound emails

I have a server configured with Postfix in my business office. I have another server at a hosting provider that I want to send all my outbound mail through. How can I do this. The only way I know its ...
1
vote
1answer
1k views

450 4.7.1 Client host rejected: cannot find your hostname

I have a Postfix/Dovecot email server which fails to deliver emails to some addresses. Here's an example of what is says: <xxxxx@board.com.ua>: host mail.da.net.ua[91.213.154.4] said: 450 4.7.1 ...
1
vote
1answer
212 views

Postfix DSN code explanation

Since few days ago I was unable to receive automatic emals sent from my PHP application. When I use Terminal to send an email to my @gmail address, everything works. When I try to send it to my ...
1
vote
1answer
109 views

roundcube/managesieve sends vacation replies only to local users

I've had a round cube / postfix setup with os x server (10.8) for some time working. Today we discovered that the vacation filter is only sending messages to local users. It was working some time ago, ...
1
vote
1answer
166 views

postfix discard or change Message-ID header based on another header line

I want to change the Message-ID header or better yet, discard it. I know everyone is going to ask "Why would you want to do that?" because I know it sounds weird to even write it. Well I am ...
3
votes
1answer
173 views

Postfix SMTP relay server

I use gmail to receive e-mails both from my gmail address and my own domain, but gmail no longer allows you to send e-mails from your own domain name unless you provide your own SMTP server to send ...
4
votes
1answer
188 views

Postfix SMTP authenticated can send as anyone

The server correctly accepts/rejects the logins though dovecot's authentication mechanism, but after that I can pretend to be anyone when sending emails. smtpd_sender_login_maps = ...
2
votes
2answers
71 views

postfix relay based on origin

I have 4 servers. prod1.example.com, prod2.example.com, dev1.example.com, and dev2.example.com. They all send their mails to smtp.example.com. This server does the relay. Now I want that dev1 and dev2 ...
9
votes
2answers
2k views

Can't receive mails from Gmail

A few days ago Gmail suddenly decided to stop sending mails to my mailserver. I am using Postfix and Dovecot with an paid SSL Certificate running on Debian 7 with everything updated. My mail.log ...
0
votes
0answers
177 views

postfix always_BCC mail system configuration error

I'm trying to setup always_bcc to an archive account in order to copy all inbound and outbound mail into a mailbox that can be sucked up by a third-party cloud archive solution. Outbound, works fine, ...
7
votes
2answers
236 views

How widely supported is forced TLS on inbound SMTP connections?

I run an MTA consisting of the standard Postfix, SpamAssassin, ClamAV, SPF/DKIM checks etc. This MTA is used for inbound email only, doesn't host any accounts and forwards any mail that passes said ...
4
votes
1answer
64 views

Postfix address verification server not working

I try to use the Postfix address verification server, but I can’t make it work. Here is the content of my main.cf file, generated by a postconf -n command. I mark the four line I modified myself. The ...
0
votes
1answer
59 views

Postfix - Need to log email and then redirect to same user different domain

My goal is to add emails to a DB and then send them on to the user at a different domain. My mail server is hosted elsewhere using my domain, (me@example.com). TO get this working, I set up postfix ...
1
vote
1answer
319 views

Postfix restrict all incoming mail to certain domains, then allow all for specific user addresses

We use Postfix for company email address's given to employees... all are of the format username@example.com. Basically I want to restrict all incoming mail to these addresses to only allow emails ...
0
votes
1answer
71 views

Postfix: how to redirect a single email address depending on the sender

I'm trying to add a rule to Postfix. My goal is as follows: when anyone EXCEPT (server@example.com) sends an email to (info@example.com) forward it to (sales@example.com). If server@example.com is ...
0
votes
2answers
336 views

mailman refused relaying after update [closed]

After I updated my mailman installation the server is now refusing to send the messages... and I can not figure out why. (I receive the messages since my mail account is on the same server, but they ...
0
votes
1answer
122 views

Postfix forward incoming emails to mailin

I've setup the smtp server using postfix with dovecot on mail.example.com server running on port 25. And then I've also setup another smtp server using mailin (http://mailin.io) on mail.example.com ...
0
votes
1answer
87 views

postfix - hock - extracting information out of processed emails

The setup Linux, Debian Wheezy, serves as mail server for about 1000 users. Courier and Postfix installed in this box. Info about the server It is a postfix setup which drops the emails to the ...