CVSROOT:        /cvs
Module name:    src
Changes by:     o...@cvs.openbsd.org    2023/11/08 01:46:35

Modified files:
        usr.sbin/smtpd : dns.c mta.c smtpd.h 

Log message:
RFC 7505 ("Null MX") handling

mail delivery will not be attempted if a domain advertises a single MX
record with preference 0 and a zero-length label.

based on an initial diff from Philipp (philipp+openbsd [at] bureaucracy
[dot] de), thanks!

ok jung@

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