mutt error sending mail: gnutls_handshake: An unexpected TLS packet was received

Question

I keep on getting an error as indicated by the title sending email in neomutt, This is what I put in my muttrc:

set from = "[email protected]"
set realname = "my name"

set smtp_url = "smtps://[email protected]@smtp-mail.outlook.com:587"
set smtp_pass = "pass"
set imap_pass = "pass"

set ssl_starttls = "yes"

set folder = "imaps://myemail@[email protected]:993"

set header_cache = "~/.mutt/cache/headers"
set message_chachedir = "~/.mutt/cache/bodies"
set certificate_file = "~/.mutt/certificates"

set editor = "vim"

So far I've tried changing my smtp url from smtps to smtp, but this only gave me the error "SASL authentication failed".

score 3 · Answer 1 · answered Sep 03 '21 at 11:16

set smtp_url = "smtps://[email protected]@smtp-mail.outlook.com:587"

Port 587 is not smtps, but plain SMTP with optional upgrade to TLS using STARTTLS command. smtps is instead on port 465.

The "unexpected TLS packet was received" is the result of trying to interpret the non-TLS data (server welcome message) initially received on port 587 as TLS, which fails.

mutt error sending mail: gnutls_handshake: An unexpected TLS packet was received

1 Answers1