4fa663ae20
Fix a possible race condition when sending a HUP signal to restart
the daemon. This could terminate the current process without
starting a new daemon. Problem reported by Wolfgang Breyha
of SE Netway Communications.
Only apply MaxHeadersLength when receiving a message via SMTP or
the command line. Problem noted by Andrey J. Melnikoff.
When finding the system's local hostname on an IPv6-enabled system
which doesn't have any IPv6 interface addresses, fall back
to looking up only IPv4 addresses. Problem noted by Tim
Bosserman of EarthLink.
When commands were being rejected due to check_relay or TCP
Wrappers, the ETRN command was not giving a response.
Incoming IPv4 connections on a Family=inet6 daemon (using
IPv4-mapped addresses) were incorrectly labeled as "may be
forged". Problem noted by Per Steinar Iversen of Oslo
University College.
Shutdown address test mode cleanly on SIGTERM. Problem noted by
Greg King of the OAO Corporation.
Restore the original real uid (changed in main() to prevent
out of band signals) before invoking a delivery agent.
Some delivery agents use this for the "From " envelope
"header". Problem noted by Leslie Carroll of the
University at Albany.
Mark closed file descriptors properly to avoid reuse. Problem
noted by Jeff Bronson of J.D. Bronson, Inc.
Setting Timeout options on the command line will also override
their sub-suboptions in the .cf file, e.g., -O
Timeout.queuereturn=2d will set all queuereturn timeouts
to 2 days. Problem noted by Roger B.A. Klorese.
CONFIG: Fix parsing for IPv6 domain literals in addresses
(user@[IPv6:address]). Problem noted by Liyuan Zhou.
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