Linux Mail Server - cannot send email using outlook

[d_bachelor01]

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

[Ivan Ferreira]

>>> 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.

[Ivan Krastev]

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]

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]

you should add MS Exchange IP into postfix whitelist.

[Ivan Ferreira]

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

mynetworks_style
mynetworks
relay_domains

[d_bachelor01]

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

[Vitaly Karasik_1]

>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?