Postfix is Wietse Venema's mail server that started life at IBM research as an alternative to the widely-used Sendmail program.

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1answer
1k views

setting up a relay port for postfix smtp on CentOS 7

A CentOS 7 server has postfix, dovecot, and mailx installed. I am able to make an IMAP connection to the server from my remote Thunderbird client running on my local devbox. But I am not able to ...
6
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1answer
8k views

Configure postfix to send and receive to and from localhost

Does anyone know what needs to be configured for postfix so that emails can be sent to localhost and received from localhost? e.g. send an email to user1@localhost will: result in user1 receiving ...
7
votes
3answers
13k views

Postfix doesn't send mail, complaining about “Host or domain name not found”

I followed these instructions in order to send mail and here's the Postfix log: Sep 26 00:46:24 tshepang postfix/smtpd[5728]: 8EE2464931: client=localhost[127.0.0.1] Sep 26 00:47:44 tshepang ...
6
votes
1answer
758 views

Postfix configuration - keep the envelops

I have a postfix server that delivers mail and send a copy of the outgoing mail to a second server for content analysis using the following configuration (addresses and IPs have been replaced): ...
4
votes
2answers
4k views

sending email to IP address via postfix

My friend and I have configured two Postfix mail servers on our laptops. We succeeded in sending mail to a real network (to some Gmail accounts) from our computers; that was the easy part. We now ...
2
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2answers
1k views

How to send mail from a remote SMTP host?

I have Postfix suite installed locally on Ubuntu 10.10. I can send/receive mail to my local address, e.g. user@local.com. I'm given credentials to a remote mail server mailbox, e.g. ...
1
vote
1answer
3k views

Mail filtering with procmail in a postfix/dovecot system with virtual users

I had a postfix/dovecot system with mail users working. After unsuccessfully following a few tutorials online to enable procmail, now I have an unusable system. What I want is to enable procmail ...
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4answers
15k views

Helo command rejected: need fully-qualified hostname Error

My mail server is in some blacklist cause of spams. I reconfugured postfix. Aften then My customers get this error they can't send emails. 404 4.5.2 <PLLAMNAZIFE>: Helo command rejected: need ...
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3answers
987 views

unable to view postfix email from centos 7 command line, why not?

I have postfix installed on a development box and I used the parameters from this other posting to configure postfix to work on localhost only. But the other posting does not explain how to send ...