I am working on configuring /mutt/ to send mail via /msmtp/. Strangely, if I user /msmtp/ from shell, all okay, that means, that .msmtprc is correct. However, mail sent with mutt do not come. I have this line in .muttrc. set sendmail="msmtp" How can I debug this problem? EDIT: I found, that if I send just text, like msmtp 'my-email' <<< "Hello", it works. But if I send fully builded email-header, it do not. Is it gmail politics or what?