Guys, using echo hello | sendmail -s test john.black@xxxxxxxxxx fails. It stays in /var/spool/mqueue or /var/spool/clientmqueue with DERIVED status. I think that either FROM address & Return-Path are wrong, or the sender's address could not be resolved by target SMTP. How do I send a simple e-mail? sendmail is too complicated. Is there anything else (exim and postfix I tried and cried...)
