Nothing gets fixed until people realize it's broken. And yet, it's also true that using TLS for mail submission and access has been best common practice for several years, with most providers specifying TLS in their…
Except that most consumer ISPs block outgoing traffic on port 25 to make spamming more difficult. So you won't be able to send mail directly to the recipient's SMTP server.
For the case of mail submission, there is a lot of legacy hardware/firmware out there still in use that simply doesn't support TLS, and is mission-critical, and is likely to become obsolete before anyone upgrades it. A…
See my reply below. My draft originally included the mail relaying case but trying to address both submission and relaying in the same document made the document unwieldy. In theory they both use the same protocol…
This document only addresses email submission and access because a single document that covered email submission, access, relaying, key lookup/verification, and message encryption would be huge and take forever to get…
Nothing gets fixed until people realize it's broken. And yet, it's also true that using TLS for mail submission and access has been best common practice for several years, with most providers specifying TLS in their…
Except that most consumer ISPs block outgoing traffic on port 25 to make spamming more difficult. So you won't be able to send mail directly to the recipient's SMTP server.
For the case of mail submission, there is a lot of legacy hardware/firmware out there still in use that simply doesn't support TLS, and is mission-critical, and is likely to become obsolete before anyone upgrades it. A…
See my reply below. My draft originally included the mail relaying case but trying to address both submission and relaying in the same document made the document unwieldy. In theory they both use the same protocol…
This document only addresses email submission and access because a single document that covered email submission, access, relaying, key lookup/verification, and message encryption would be huge and take forever to get…