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Re:Ask HN: Is there room for a new email hosting service? by rbc on Tuesday July 23, 2024 @04:49AM (#41044022)
I think maintaining the MUA access to the mail server is one of the more complicated issues. A globally accessible IMAP or POP3 service faces a lot of abuse. These days, I use MUA's the that read directly off the spool. Old fashioned, but heads off all kinds of badness.
Re:Ask HN: Is there room for a new email hosting service? by gerdesj on Tuesday July 23, 2024 @07:34PM (#41052156)
Mail User Agent is sooo old school ... a MUA is a Make Up Artist these days. I'm happy with that - the world moves.

I have no idea what "MUA's the that read directly off the spool" means.

I run a few Exim MTAs ie SMTP front ends. Some front MS Exchange and some front Dovecot imapd. They work fine.

Re:Ask HN: Is there room for a new email hosting service? by rbc on Wednesday July 24, 2024 @06:37PM (#41062955)
/var/mail

No listener required, or the services, authentication and encryption that go with them. In this case I run email for myself. Email gets pushed from an Internet MTA with global addresses, to a local MTA that happens to be my workstation. I either read the email from the console, or ssh in through a jump host.