On 2026-05-10, Peter N. M. Hansteen <[email protected]> wrote: > Hi, > > I'm extremely late to the game I know, but today I converted a mail server > from > exim to OpenSMTPd with actually only minor fiddling. > > But one thing stands out as odd: when I send from my Mac using Apple Mail > to any address with a dot (.) in the local part, smtpd rejects the message: > > May 10 17:54:27 skapet smtpd[3444]: 6fe63538de3844b2 smtp failed-command > command="RCPT TO:<[email protected]>" result="550 Invalid recipient: > <[email protected]>"
Seems very strange. > Oddly, sending to the same address from mutt on the server itself works fine. Is that sending via SMTP (e.g. 'set smtp_url = "smtp://..../') or just by using /usr/sbin/sendmail (default) ? > Is this a known problem with Apple clients, or is it tweakable in the smtpd > config > one way or the other? > > - Peter > -- Please keep replies on the mailing list.
