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Linux Mail Server - cannot send email using outlook

d_bachelor01
Frequent Advisor

Linux Mail Server - cannot send email using outlook

Hi Guys,

I have a linux mail server running postfix and squirrel. We were able to successfully do the following:

- send emails using webmail (internal and external emails)
- receive emails using webmail (internal and external emails)
- receive emails (in our workstations) using MS Outlook Express that connects to our email server..

Our problems right now is that we cannot send emails (whether internal or external) using MS Outlook Express and the delivery of the emails is quite slow. Any ideas or suggestions how to fix this? Anyone who has encountered the same problem?


Thanks in advance!!

-jef
7 REPLIES
Ivan Ferreira
Honored Contributor

Re: Linux Mail Server - cannot send email using outlook

>>> delivery of the emails is quite slow.

This should be a problem with DNS configuration.

>>> we cannot send emails (whether internal or external) using MS Outlook Express

What is the error? Ensure that the firewall is not blocking port 25.

Ensure that postfix is listening on all interfaces:

inet_interfaces = all

Check SELinux.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Ivan Krastev
Honored Contributor

Re: Linux Mail Server - cannot send email using outlook

Check your sender restrictions in postfix configuration.
Usually it allows only from 127.0.0.1 and you can send via web interface.


regards,
ivan
d_bachelor01
Frequent Advisor

Re: Linux Mail Server - cannot send email using outlook

Hi Guys!

This is the error message:

Your message did not reach some or all of the intended recipients. Subject: test 5:51 Sent: 1/21/2008 5:52 PM The following recipient(s) could not be reached: 'xxxxxx@yahoo.com' on 1/21/2008 5:52 PM 550 Relay not permitted
Vitaly Karasik_1
Honored Contributor

Re: Linux Mail Server - cannot send email using outlook

you should add MS Exchange IP into postfix whitelist.
Ivan Ferreira
Honored Contributor

Re: Linux Mail Server - cannot send email using outlook

Check the section "TRUST AND RELAY CONTROL" in main.cf:

mynetworks_style
mynetworks
relay_domains
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
d_bachelor01
Frequent Advisor

Re: Linux Mail Server - cannot send email using outlook

Hi Guys,
Still having problems in sending using outlook or thunderbird. Please see my attached main for comments.
Vitaly Karasik_1
Honored Contributor

Re: Linux Mail Server - cannot send email using outlook

>inet_interfaces = localhost
>inet_interfaces = all

Let's comment the first line and leave only "=all"


BTW, are you able to send email from outlook to the postfix box itself?