If anyone needs for future testing openssl s_client -starttls smtp -connect mail6.uits.uconn.edu:587 openssl s_client -connect 137.99.26.36:465
Replace IP/hostname with yours. -ALF -Angelo Fazzina Operating Systems Programmer / Analyst University of Connecticut, UITS, SSG, Server Systems 860-486-9075 -----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Matus UHLAR - fantomas Sent: Tuesday, August 22, 2017 11:35 AM To: postfix-users@postfix.org Subject: Re: no response from postfix on submission port (or 465) >On Tue, 22 Aug 2017 10:14:11 +0000, Alef Veld stated: >>Now which clarifies things a lot. I'll probably keep 465 with wrapper mode to >>support outlook expresss or other clients which want it and put 587 without. On 22.08.17 07:23, Postfix User wrote: >MS Outlook Express was depreciated in Windows 7, way back on Oct 2009. It has >been years since I have seen anyone actually use it. I removed wrapper mode 5 >years ago and never looked back. I've seen comments from users/admins who recommend using SSL-only ports like 465, as opposed to 587 where plaintext is technically possible. I've also seen problem where port 587 was blocked by antivirus trying to scan the connection, where 465 went OK. That's why I better provide both 587 and 465 on servers I maintain... -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. REALITY.SYS corrupted. Press any key to reboot Universe.
