On Tuesday 17 March 2020, Andrea Venturoli wrote: > From time to time, I receive some message that are refused > and bounce. Do to possible blacklisting, I *really* want to > avoid bounces. I use Sendmail+Cyrus a very long time and I not remember this problem exactly. Cyrus is not receive messages in two cases: 1) message contains 8-bit symbols (not encoded to base64 or QP) in header; 2) message contains NUL character. The first is subject of reject8bit option in imapd.conf. About second look to https://groups.google.com/forum/#!topic/comp.mail.sendmail/xW7S5vXDNtY May be the first one causes the "Data format error" message. -- Regards, Sergey ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
