Re: [expert] Listening port for Sendmail

[Randy Smith]

Nick;

>
> Qmail, Postfix and sendmail all talk the SMTP protocol on port 25 -
> shutting that off will stop them working.

All these mailers envoke /usr/lib/sendmail for each message sent.  Port 25
is only used when sendmail is running as a daemon and therfore the above
mailers will work.