I have a goal of securing email. Updated the company mail server and DNS (CentOS 7 + Postfix, otherwise pretty stock) with support for SPF, DKIM, and DMARC. So far, all good, and everything "just works". Our mail server has supported SMTP / TLS for a long time, but recently I've been considering requring TLS all the time. Is there anybody here who's done this? Has it caused any particular fallout? I'm curious about: 1) Requiring SMTP / TLS for any inbound email. 2) Requiring SMTP / TLS for any outbound email. Thanks -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 488 bytes Desc: This is a digitally signed message part. URL: <http://lists.centos.org/pipermail/centos/attachments/20191204/32bd97c6/attachment-0005.sig>