10 lines
573 B
Plaintext
10 lines
573 B
Plaintext
mxallowd is a daemon for pf/pflog which implements a slightly improved
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nolisting mechanism. Basically your nameserver has to be configured to
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return two MX ip addresses of which one does not run a mail server on
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port 25 (the one with higher priority). Most spammers try to connect
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directly to the first mailserver -- mxallowd blocks that. You have to
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connect to the first one and then to the second one, direct connections
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do not work. Real mailservers (not spammers) have to try all MX ip
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addresses in order (sorted by priority) until they succeed in delivering
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the mail.
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