https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68004
--- Comment #2 from Fiodar <fedor_qd at mail dot ru> --- (In reply to Mikhail Maltsev from comment #1) > Hi. Do I understand correctly, that you are were trying to post a message to > the gcc-help mailing list via mail.ru SMTP server and it got bounced? > > See https://sourceware.org/lists.html#spam You correctly understand. Thanks for link - problem solved