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How can I get qmail to work with both an smtp whitelist and smtp authentication?

If my IP is whitelisted, SMTP authentication does not seem to work (error: "the server does not support SMTP password authentication). This is particularly annoying when using our SMTP server on a roaming device, eg. an iPhone.

As soon as the iPhone is not using the whitelisted IP (ie. not in the office, but over 3G), then SMTP authentication works fine.

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How can I get qmail to work - try using supported software...? –  Alnitak Nov 14 '11 at 2:45
    
I'm sorry but I don't quite understand what you mean by that? Perhaps I should say, how can I use SMTP Authentication and an SMTP whitelist with qmail? –  ck86 Nov 14 '11 at 5:08
    
I'll be more explicit - by not using qmail. It did well for its day, but it's now old, unsupported, and missing lots of useful features. –  Alnitak Nov 14 '11 at 5:11
    
Ahh I see what you mean; unfortunately at this point we do not have a choice at this time :( –  ck86 Nov 14 '11 at 5:14

1 Answer 1

If you have the option, install something specifically as a Mail Submission Agent (MSA) for authenticated SMTP mail submission listening on port 587, and have that forward mails to your qmail MTA for subsequent delivery.

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