Re: block emails with Fetchmail...

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Kostas Sfakiotakis wrote:
Sendmail uses it for local mail delivery by default on Fedora, and it
can also be used to deliver mail by fetchmail if you like.

Am not sure that i fully understand that . Fetchmail fetches email from the remote POP3 Server then it alters the To address as to make it suitable for local delivery . Then it passes the email to sendmail . Now sendmail tricked by the altered To address believes that the email is for local delivery and for that reason it passes the email to the local mailer as defined in sendmail.cf /
sendmail.mc , which in Fedora installations is procmail .

Sendmail isn't "tricked" by the altered "To:" address; what fetchmail has done is to forward the mail to a new (local) address. All sendmail is doing is delivering the mail just as it would for any other mail it was handling.

Fetchmail doesn't have to work this way though. If you use fetchmail's "mda" option, it can invoke procmail directly and not use sendmail at all.

Paul.

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