Fix Incoming Mail Delay With Postfix

Mustafa Emre Aydın — Wed, 21 Aug 2013 12:52:37 +0000

In our case, we were using postfix via iRedMail and every incoming mail had a delay around 7 minutes. The problem was fixed by disabling the chroot operation in the settings.

Edit the file /etc/postfix/master.cf

It probably looks like this

# =============================================================
    # service type  private unpriv  chroot  wakeup  maxproc command
    #               (yes)   (yes)   (yes)   (never) (100)
    # =============================================================
    smtp      inet  n       -       -       -       -       smtpd

Change it to

# =============================================================
    # service type  private unpriv  chroot  wakeup  maxproc command
    #               (yes)   (yes)   (yes)   (never) (100)
    # =============================================================
    smtp      inet  n       -       n       -       -       smtpd

Now restart and reload the postfix mail server and you’re good to go.

[root@mail ~]# /etc/init.d/postfix restart
Shutting down postfix:                                     [  OK  ]
Starting postfix:                                          [  OK  ]
[root@mail ~]# /etc/init.d/postfix reload
Reloading postfix:                                         [  OK  ]

The post Fix Incoming Mail Delay With Postfix appeared first on VeriTeknik.

Change Outgoing IP of Postfix Mail Server

Mustafa Emre Aydın — Wed, 21 Aug 2013 12:46:49 +0000

This can get quite important when your mail server is blacklisted, or if you somehow want to simply change the outgoing IP address.

First of all, check that you DO have another ip address on another interface at the server. Either by ifconfig or anything else.

To change the outgoing IP on a postfix mail server, edit the file /etc/postfix/master.cf

Find this part in the file,

smtp      unix  -       -       -       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
        -o smtp_fallback_relay=

You should modify it to look like below

smtp      unix  -       -       -       -       -       smtp
        -o smtp_bind_address=192.168.1.1
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
        -o smtp_bind_address=192.168.1.1
        -o smtp_fallback_relay=

Of course, change the IP address 192.168.1.1 to whatever your secondary IP is.

Then restart and reload the postfix server.

[root@mail ~]# /etc/init.d/postfix restart
Shutting down postfix:                                     [  OK  ]
Starting postfix:                                          [  OK  ]
[root@mail ~]# /etc/init.d/postfix reload
Reloading postfix:                                         [  OK  ]

That’s it!

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postfix – VeriTeknik

Fix Incoming Mail Delay With Postfix

Change Outgoing IP of Postfix Mail Server