Minimal neomutt config for gmail imap

neomuttrc

set imap_user="[email protected]"
set imap_pass=`/usr/bin/security find-generic-password -w -a '[email protected]' -s 'Gmail'`

set folder=imaps://imap.gmail.com/
set spoolfile=+INBOX
set record="+[Gmail]/Sent Mail"
set postponed="+[Gmail]/Drafts"

# https://www.neomutt.org/guide/reference search sleep_time for additional info
set sleep_time=0 # be faster
set beep=no # no beep sound
set editor="/Applications/MacVim.app/Contents/MacOS/Vim -c 'set tw=74' -c 'set wrap'"
auto_view text/html
set sort=reverse-date   # default sorting by date
# When sorting by threads, this variable controls how threads are sorted
# in relation to other threads, and how the branches of the thread trees are sorted.
set sort_aux=last-date-received
# Index page format. Default "%4C %Z %{%b %d} %-15.15L (%?l?%4l&%4c?) %s"
set index_format="%4C %Z %{%b %d %R} %-15.15L (%?l?%4l&%4c?) %s"


set sidebar_visible
set sidebar_format="%B%?F? [%F]?%* %?N?%N/?%S"
set mail_check_stats

# You can use any gmail imap mailboxes
mailboxes =INBOX =[Gmail]/Sent\ Mail =[Gmail]/Drafts =[Gmail]/Spam =[Gmail]/Trash

# Vim like binds
bind attach,index,pager \CD next-page
bind attach,index,pager \CU previous-page
bind pager g top
bind pager G bottom
bind attach,index g first-entry
bind attach,index G last-entry

# Sidebar binds
bind index,pager \CP sidebar-prev                 # Ctrl-n to select next folder
bind index,pager \CN sidebar-next                 # Ctrl-p to select previous folder
bind index,pager \CI sidebar-open                 # Ctrl-o to open selected folder
bind index,pager \CB sidebar-toggle-visible       # Ctrl-b to toggle visibility of the sidebar

set realname="Vladimir Pal"
set from="[email protected]"

set smtp_url="smtps://[email protected]@smtp.gmail.com:465/"
set smtp_pass=`/usr/bin/security find-generic-password -w -a '[email protected]' -s 'Gmail'`
set smtp_authenticators="gssapi:login"

I always meet gnutls_handshake: The TLS connection was non-properly terminated. when I send mail, although I can receive mail successfully.

set smtp_url = "smtps://myemail@[email protected]: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.

check this page

https://unix.stackexchange.com/questions/667464/mutt-error-sending-mail-gnutls-handshake-an-unexpected-tls-packet-was-received