On Tue, Apr 27, 2021 at 01:49:03PM +0800, P.V.Anthony wrote: > ------- start --------------- > Apr 27 13:38:06 mail postfix/smtpd[383580]: connect from > hubie.merck.com[155.91.37.10] > Apr 27 13:38:07 mail postfix/smtpd[383580]: SSL_accept error from > hubie.merck.com[155.91.37.10]: Connection reset by peer > Apr 27 13:38:07 mail postfix/smtpd[383580]: lost connection after STARTTLS > from hubie.merck.com[155.91.37.10] > Apr 27 13:38:07 mail postfix/smtpd[383580]: disconnect from > hubie.merck.com[155.91.37.10] ehlo=1 starttls=0/1 commands=1/2 > ------- end -----------------
http://www.postfix.org/postconf.5.html#smtpd_discard_ehlo_keyword_address_maps http://www.postfix.org/postconf.5.html#smtpd_discard_ehlo_keywords smtpd-ehlo-discard.cidr: # NetName: MERCK1 # NetHandle: NET-155-91-0-0-1 155.91.0.0/16 starttls main.cf: cidr = cidr:${config_directory}/ smtpd_discard_ehlo_keyword_address_maps = ${cidr}smtpd-ehlo-discard.cidr You should also reach out to the merck.com postmaster and try to resolve the underlying issue. Why is their MTA closing the connection in the middle of STARTTLS? -- Viktor.
