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North American Network Operators Group

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Re: Time to check the rate limits on your mail servers

  • From: Valdis.Kletnieks
  • Date: Thu Feb 03 12:28:15 2005

On Thu, 03 Feb 2005 12:16:41 EST, Jason Frisvold said:

> Agreed.  And depending on your service, there are different ports
> worth blocking.  For residential users, I can't see a reason to not
> block something like Netbios.  And blocking port 25 effectively
> prevents zombies from spamming.  Unfortunately, it also blocks
> legitimate users from being able to use SMTP AUTH on a remote server..

There's a *reason* why RFC2476 specifies port 587....

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