The "smtpd.conf" man page states: relay [backup [mx]] [as address] ... ... If the as parameter is specified, smtpd(8) will rewrite the sender advertised in the SMTP session. address may be a user, a domain prefixed with ‘@’, or an email address, causing smtpd(8) to rewrite the user-part, the domain-part, or the entire address, respectively. ...
I tried this: relay as "@my-domain.com" But I get a "syntax error"? MS Outlook users get "550 Invalid recipient" errors when trying to send mail outside of our domain. The mail log entries are like: Jan 16 07:36:28 myserver smtpd[70549]: b76cb7a2aa7f61b8 smtp event=failed-command command="RCPT TO: <some.b...@somewhere.com>" result="550 Invalid recipient" Using the command "mail" to compose a message and send it works. My "smtp.conf" is: listen on all pki mail.example.com certificate "/etc/ssl/my-domain.com.crt" pki mail.example.com key "/etc/ssl/my-domain.com.key" table aliases file:/etc/mail/aliases accept from any for domain "my-domain.com" alias <aliases> deliver to mbox accept for local alias <aliases> deliver to mbox accept from local for any relay # relay relay as "@my-domain.com"
