This user doesn't really want to do anything I suspect. Instead of high quality technical/policy posts, this list is consumed with personal questions that provide little general value, by this one individual.
Scott On Thursday, 18/07/2024 at 09:08 Paul Smith* via mailop wrote: On 18/07/2024 13:36, Jeff Pang via mailop wrote: > Can I setup mailserver to accept messages via sdl/tls only from other > MTA? How to disable peer MTA send me plaintext mail? > You can certainly do that. But don't be surprised if some other mail servers can't send mail to you. Why would you want to do this? Note that you cannot control what happens before the mail gets to you. So, even if you only accept mail using TLS, then the message may have gone: User -> MSA (no TLS), MSA -> ISP (no TLS), ISP -> content filter service (no TLS), content filter service -> you (TLS). It *probably* won't, but you have no control, so it's perfectly possible for it to have done so. Also, note that even if TLS is used for all transmission paths, the unencrypted messages are theoretically available to anyone or any software with access to any of the mail servers that the message has passed through. If you're concerned about message privacy, you need to use end-to-end encryption (eg PGP or S/MIME). Paul _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
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