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Old 4th April 2009, 11:34
reason8 reason8 is offline
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But it was working last week with no problem. Then this week it just stopped. What could explain this?

Also, if I have to set up relaying, how would I go about implementing this? I have a mail relay account but I dont know how to incoporate it into postfix. My relay provider has this information on their website:

This document describes 5 easy steps to setup your Postfix email server as smarthost to relay on DNS Exit mail relay server for all email sending.

The mail relay service from can be found at here

1. Create password maps file (it assigns username/passwords to specified mail servers). You can choose any name, let's say it is /etc/postfix/relay_passwd. It's content should be as follows: USERNAME:PASSWORD

Note: Replace USERNAME and PASSWORD with your DNS EXIT mail relay username and PASSWORD.

2. Set proper permissions for that file:
# chown root:root /etc/postfix/relay_passwd
# chmod 600 /etc/postfix/relay_passwd

3. Create hash from maps file (remember to do it each time you change your maps file):
# postmap /etc/postfix/relay_passwd

4. Configure your /etc/postfix/
relayhost = []
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/relay_passwd
smtp_sasl_security_options =

Note: If your ISP blocks outgoing port 25. You can choose to use alternative SMTP ports by appending the port at the end:
relayhost = []:26

5. Reload or restart your postfix:
# /etc/init.d/postfix restart

I set it up this way but I still got the same error. Also, if what you are saying is true, would that stop me from sending emails to other addressed on the same server? For example, I have and send an email to (both are hosted on ISPConfig Server. I do not get the mail relay error in isconfig but does not get the email.


Last edited by reason8; 4th April 2009 at 11:38.
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