On 05/30/2002 10:29 PM, Bruce Vander Werf wrote:
> Hi,
> My calls to mail() take a very long time to resolve, so I did a little
> investigating. If I try to Telnet to port 25, it takes about 30 seconds for
> the SMTP server to respond. Telnet to port 23 on the same address resolves
> immediately, as does normal web access (using the same address so I don't
> believe DNS is the culprit. Besides, mail() is slow, and that is accessing
> the SMTP server locally. What would be taking SMTP so long to respond? Any
> configuration parameters I need to look at?

Maybe reverse DNS resolution of the client machine IP and anti-spam 
blackhole verification.


Manuel Lemos

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