Change ports of mails in queue (postfix)

[Royal]

Hey folks,

Due to a problem with rav antivirus which listens on port 10025 I have now some mails (approx. 500) in the queue which cant be delivered because no rav listens on 10025. How can I change that port to 25?

Any suggestions?

[kpack]

Why don't you just redirect port 10025 to port 25 using iptables:

iptables --table nat -j REDIRECT -A PREROUTING --proto tcp --dport 10025 --to-ports 80

[kpack]

Ooops, to --to-port should have been 25, not 80

[kashani]

[Royal]

Thanks for the answers.

I'm currently not using iptables. How should the rules-file look like when only want to use this rule. -> what is needed in the rules-file?

[kpack]

Since you only need this temporarily to clear out your postfix queue (using "postfix flush" as kashani suggested), you don't need to add the rule to any file. Just execute the suggested command as root from the command line.

However, if you've never used IPTABLES, you'll need to compile it into your kernel before you can do this. If you think you might to use iptables for more than just this, you might want to look at shorewall. For just this, it would be more complicated. For configuring a real firewall, it makes things much easier.

[Royal]

Worked fine. Thanks