Free and open source mail transfer agent (MTA) that routes and delivers email

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0
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1answer
17 views

Postfix relay for gmail sending as root

I've configured postfix to relay gmail (google apps) but the emails are sending as root@mydomain instead of admin@mydomain as (I believe) I've configured. I think the config is ok because I'm not ...
0
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0answers
31 views

DNS issue mail server

I tried to find an answer to this one around with no luck so far. I am not a sysadmin, but I work with mailings and one of our server presents some issues. I do not have personal access to the server, ...
-3
votes
0answers
22 views

check maximum number of virtual mailboxes on mail server [on hold]

what's the maximum number of virtual mailboxes i can create in Linux mailserver ( Postfix/Dovecot ) ? is there a configuration parameter for this ?
0
votes
1answer
14 views

whitelisting some domains & some users on specific domains as destinations for Zentyal/Postfix

I have been using sendmail as MTA & SquirrelMail for webmail. I used to have following setup to restrict recepient in SquirrelMail. SquirrelMail had a plugin called Recepientrestrictions which can ...
0
votes
1answer
14 views

Default Relayhost and custom relayhost for domains

I have a customer which needs a custom relayhost for sending emails. So I want to choose this relayhost only for this domain. customer.example.com -> relayhost A (all other domains) -> relayhost B ...
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0answers
19 views

Postfix: Disable Relay for Authenticated Users or Disallow Sending As Another User

BACK STORY: We are a small web and email hosting company. A few months back we had an issue where a few of our email users contracted a virus that used the authentication from Outlook to our server ...
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0answers
25 views

Postfix cannot authenticate against SASL

My system is Debian 7 aka Wheezy with postfix, courier, and mysql installed. Courier works well and if I issue testsaslauthd -u user@domain -p password -f /var/spool/postfix/var/run/saslauthd/mux -s ...
-1
votes
1answer
13 views

Postfix conditionally forward email

How do you set up automatic email forwarding based on conditions like: forward if from emailaccount@domain.tld forward if from domain is domain.tld forward if subject contains word 'Urgent' and ...
1
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1answer
29 views

Postfix SMTP authentication

I used this guide to create a mailserver for a small business: https://workaround.org/ispmail/wheezy. IMAP is working perfectly but i ran into an issue with SMTP and Authenticated SMTP. When i use an ...
1
vote
2answers
62 views

Send mail from Docker container with host's Postfix

I am running an Ubuntu 14.04 (Linux) server. I have installed and configured Postfix and OpenDKIM very nicely on the server; I can send emails to myself with commands such as echo hi | sendmail root, ...
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0answers
25 views

Postfix misconfiguration: external clients cannot send emails

I have Postfix installed on a server that sends about 100-500 emails per day by PHP script (postcard service) Then I wanted to configure Postfix the way that a couple of admins could send/receive ...
0
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0answers
11 views

Postfix+dovecot+pgsql: Relay access denied [duplicate]

I just set up my first mail server and have one problem with sending email through it. I created an account in thunderbird and I'm able to receive mails sent to my mail-server but I cant send any ...
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0answers
35 views

Reinstalled postfix MTA: all messages end up as junk (Hotmail/Office 365)

We had a high volume mailserver based on Postfix (about 15k emails a day) operating without any issues. Due to performance reasons, we had to reinstall the machine. We use the same IP address but did ...
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votes
0answers
37 views

Postfix email ssl/tls error “[postfix/smtpd] SSL_accept error from”

I created my own CA certificate then used it to create a server cert for postfix, this has been working for sending and receiving email from gmail/google and i thought everything was working fine, ...
0
votes
1answer
52 views

Postfix wont send mail to external email addresses listed in virtual_alias_domains

We have our main server at mail.mainserver.com with the catchall address catch@mail.mainserver.com We also have two other domains: domain1.com and domain2.com which are hosted at gmail. Gmail is ...
0
votes
1answer
35 views

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: ...
0
votes
1answer
17 views

postfix cannot communicate with target server via TLS/SSL

I am able to connect my postfix server with TLS. All things are set up. But when i send a message with this secure connection, target server (for example gmail) receive my message without TLS/SSL ...
-2
votes
0answers
38 views

How to bounce outgoing spam messages with postfix and spamassassin milter? [duplicate]

One of my email server users recently had their password compromised and resulted in my server briefly becoming a spam source. I finally managed to clear the blacklists and have implemented ...
-2
votes
0answers
74 views

Unable to Stop Mail Server Abuse

I have a mail server that has somehow been compromised. Its been well over a week and since then I have changed many settings to no avail. As a first step I saw the mail logs which indicated a high ...
2
votes
1answer
37 views

Postfix instances sporadically processing other instances incoming emails

I have a Postfix configuration problem that had me head scratching for days and I'm reaching out to you to help me figure out what the issue is, please bare with me while I explain my setup. I have a ...
1
vote
1answer
43 views

Postfix stopped sending to the internet

I am quite new in server managing, and I have a vps with Centos 6.5 / Plesk 11.5. My problem is that after having two mail accounts hacked, and used to send spam mail, I now can't send to most parts ...
1
vote
1answer
23 views

iptables + postfix cant send email

Recently my host provider sent me a letter about some sort of attack from my server. I'm not into security so i found some tutorial and closed all unused ports with iptables. Here is my iptables ...
-1
votes
1answer
15 views

some services switched off automatically

with my company we have a VPS. We have some issues with it. this morning the pure-ftpd was stopped. I had to start also postfix and the cron jobs were off for 3 hours. My config : Debian GNU/Linux 7 ...
0
votes
1answer
65 views

Postfix SMTP Server fails to send messages to anyone outside the domain

Here is the result of a recent test on my SMTP server, I just want this server to send emails which used to work perfectly upto about a week ago Resolving hostname... Connecting... SMTP -> FROM ...
0
votes
1answer
63 views

sieve redirect to foreign email gets “Relay access denied”

I have a postfix mail server with sql authentication and I want to implement sieve on it. Sieve is working relative good, rules who contain 'fileinto' are executed perfectly. I configured a rule in ...
-1
votes
1answer
29 views

Get ip of all user who has logged in to email account [closed]

Ok so I suspect that someone who shoud not have access to one of the email account on my server got it. I could go through every line of the log files but i want to know is there a script/line of ...
-1
votes
1answer
32 views

postfix cannot access dovecot config file

I do not receive email because of the below, as mentioned in my mail.log: Sep 21 07:58:32 WWW postfix/pipe[5118]: 8F5FD605C8: to=<myname@mydomain.com>, relay=dovecot, delay=50089, ...
0
votes
1answer
52 views

Postfix: Pipe to script bounces sent to specific virtual user

I'm building a small ticket system where basically some mail accounts of my email server are piped into a PHP script that will take care of the emails. The server is running, I can send email over ...
1
vote
1answer
38 views

Blocking messages with an empty message-id in postfix

I've been receiving some spam where the message-id is empty, for example: Sep 18 12:07:16 postfix/cleanup[21530]: message-id=<> I don't use SpamAssassin. Is there a way using postfix to refuse ...
0
votes
1answer
54 views

Postfix config for backend webservers behind a load balancer

I've two web servers (ws1.example.com, ws2.example.com) with postfix installed locally as a mail rely (using mandrillapp), user access them via www.example.com, which is a load balancer On ws1, the ...
0
votes
1answer
16 views

Postfix/spamassassin incoming mail not being filtered, but outgoing is

I have what I hope is a fairly normal home postfix setup. I fetch POP3 mail using fetchmail, which passes on to postfix via /usr/sbin/sendmail. In postfix's master.cf I added a spamassassin service, ...
0
votes
1answer
61 views

550 Recipient address rejected: User unknown (in reply to RCPT TO command) - for an external domain

In postfix, I'm unable to receive mails from the specific domain but I'm able to send mails to it. For some reason postfix thinks the domain is internal, correct me if I'm wrong? Sample from postfix ...
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0answers
17 views

Recreating mailbox on postfix migrated server

I was trying to duplicate and migrate an old server. Old server is centos 4 and new server is centos 6 Postfix,Dovecot,Maildrop I have managed to migrate all databases and modify the changes ...
-1
votes
0answers
21 views

Postfix 5.7.1 Relay access denied

I am trying to relay all my emails from localhost to an SMTP server in a development environment. My postfix master.cf file looks like below smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff ...
0
votes
1answer
35 views

Postfix: use relayhost only when direct delivery not specified

I read up on using relayhost with Postfix 2.6.6. It's possible to use different relay hosts, with different credentials, for different senders. But how do I use direct delivery with specific senders ...
0
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2answers
29 views

Is there a way to whitelist and address or domain in Postfix's helo_restrictions?

I'm using postfix helo_restrictions to blacklist some spam leaning domains. One of those is a service that provides email service to people who want email addresses with their domains, but don't want ...
1
vote
1answer
24 views

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 = ...
0
votes
1answer
34 views

setting up postfix email forwarding on ec2 when using route 53

I'm trying to make email forwards for my domain on EC2. I use route 53. I have added following two lines to /etc/postfix/main.cf virtual_alias_domains = example.com virtual_alias_maps = ...
2
votes
0answers
30 views

Postfix SASL with Dovecot and Authenticated Smarthost

I have a bit of a problem; I have configured postfix to use dovecot for SMTP AUTH, therefore I had to specify dovecot authentication in the main.cf file. The problem is, I need to also authenticate to ...
0
votes
1answer
35 views

dovecot error Unknown setting: unix_listener

I'm trying to enable postfix auth. I'm editing the this section from /etc/dovecot/conf.d/10-master.conf # Postfix smtp-auth unix_listener /var/spool/postfix/private/auth { mode = 0666 user = ...
-1
votes
2answers
88 views

“Relay access denied” when sending email via php mail in zpanel

I have installed zpanel on my centos server i am using php mail function to send signup email to my clients. it was working fine on my virtualmin server but when i moved my site to zpanel server it is ...
0
votes
0answers
45 views

Ubuntu 14.04 ISPConfig3 Postfix / Dovcot can send email but cannot receive

As the topic... I have no background on deploying server so if possible, I would hope to get explained a bit. I can receive normally using my mail from other provider, but when I try to receive ...
0
votes
0answers
37 views

Change mailboxes owner

I'm currently using Qmail + VPOPMail + Virtualmin on my server and planning to migrate to Postfix + Dovecot + Virtualmin. Now my setup is almost finished. In my old setup, mails were delivered in ...
0
votes
1answer
22 views

Postscreen sometimes stops the mail

"The Postfix postscreen(8) server provides additional protection against mail server overload. One postscreen(8) process handles multiple inbound SMTP connections, and decides ...
1
vote
0answers
27 views

Postfix — auto blacklist senders who send to 'honeypot' email addresses

I'm using postfix + spamassassin (amavis) now and I'm trying to increase my hit rate, so I've been looking at the logs to try to see any patterns in email that is obvious spam but gets low scores. ...
0
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0answers
59 views

Postfix - forcing to check MX records to send mail

Here's the issue. We are setting up a new Web Sever and Email server on Ubuntu using Zpanel software. The domains we host have already been moved over. Likewise email accounts for each domain have ...
0
votes
2answers
53 views

How to verify if an email was successfully sent by postfix?

I get asked day by day to verify if a mail was successfully sent out by our server (because client complains that he sent it to xy and his recipient never got it). Most likely this isn't our fault but ...
1
vote
2answers
143 views

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: <nancy_mitchell@tagbook.co.nz> ...
0
votes
1answer
18 views

PostFix Config and PHP

I'm trying use the PHP mail function to send email on a server (the server is only suppose to send emails and not receive any emails) The PHP mail function returns that email has been sent, however ...
-5
votes
1answer
57 views

how to not bounce, postfix to not return “not found” when the address does not exist [closed]

I want to enable a second MX with the same domain, with some users on different MX. how is this to be done? how do I tell postfix to not bounce, postfix to not return "not found" when the address does ...