On 2012-01-23 14:30, Amira Othman wrote:

Hi all

I am using postfix 2.8 with dovecot-1.2.17-0_116.el5 on cento 5.7 server . when I changed smtp port from 25 to 587 from postfix configuration my mail server stops to receive emails. I think it sounds strange and I don't understand why this happen any one can help me

Regards

If this SMTP server is your MX record, then you need to use port 25.

Only use the 587 port for authenticated submissions from your own users for outgoing email.

-- Message sent via my webmail account.