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Old 7th February 2013, 05:57
Salim Hoolash Salim Hoolash is offline
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Default SOLVED: Postfix - Lost connection while receiving greeting

falko,

You put me on the right track. Since our mail server is on a private address, I could not verify whether my IP address was blacklisted with the site you mentioned. So, after investigation with my ISP provider, I found out that they have 2 mail relay servers one on address 10.XXX.XXX.49 and the other on 10.XXX.XXX.50. I figured out that I could not authenticate on the '50' one but it was OK on the '49' one. So, instead of having 'relayhost = Blank' in /etc/main.cf, I added relayhost = 10.XXX.XXX.49 thus forcing mails from my server to relay through address '49'. Now, mails are flowing without problem.

Thanks a lot for your help.
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