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Old 26th June 2009, 10:40
edge edge is offline
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Default Stop a certain domain sending any email?
Is it possible to block one domain that I'm hosting on my ISPconfig2 system to send e-mail with postfix?

Why?? I know that it sounds stupid, but some person found a way to send email through an application that I'm hosting.

I'm working on a fix for this application, but for now the easiest (and fastest) way to fix this is to stop ANY email that is beeing send from this domain. Receiving email for this domain must still work!

Thank you for any info on this.
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Old 27th June 2009, 19:23
falko falko is offline
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You can do this with Postfix header checks: http://www.postfix.org/header_checks.5.html
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Old 27th June 2009, 20:15
edge edge is offline
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That looks promising.
Thank you
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Old 28th June 2009, 11:27
edge edge is offline
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Okay.

To stop (discard) domain XYZ.TLD to send email with postfix use this in the /etc/postfix/header_checks
Code:
/^From: .*@XYZ\.TLD>/ DISCARD
Last edited by edge; 28th June 2009 at 21:19.
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