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Category Archives: qmail
How to update qmail relay rules
D. J. Bernstein’s Qmail, now in the public domain, is a powerful yet clumsy SMTP messaging system. One of the most common problems is updating the rules for allowing SMTP relay, or denying the same. If you qmail-smtpd under tcpserver, … Continue reading
Posted in Email Servers, How Tos, qmail
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Qmail lacking features, view config
/var/qmail/bin/qmail-showctl will show you the running config. Qmail does not allow you to restrict max recipients or max messages per session. I saw reference to a plugin to handle these controls, but do not know the name of it. You … Continue reading
Posted in Email Servers, qmail, SMTP
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Qmail SMTP routes, single route
Qmail smtproutes can only handle one route per egress domain name. Example: example1.com:10.0.0.1 example1.com:10.0.0.2 Will send mail only to 10.0.0.1 The second entry will be ignored. You are better off using round-robin DNS or submitting a patch to handle priority … Continue reading
Posted in Email Servers, qmail, SMTP
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