Very slow sendmail greeting

Michael Voight mvoight at cisco.com
Tue Feb 29 19:13:22 UTC 2000


Did you test the reverse DNS for the the address of the sending machine?

Michael

Morris Jones wrote:
> 
> Hi ...
> 
> My friend and I have set up SMTP backups for each others machines, Linux
> machines running the latest sendmail (8.9.3).  We have domains set up
> and working well.
> 
> As I was testing our mail relaying, I noticed that sendmail was taking
> a very long time to answer a connect to port 25 with an SMTP greeting,
> about 30 seconds.  This was true on my machine and his.
> 
> The obvious culprit is that sendmail is timing out on a DNS lookup,
> but the reverse and forward DNS for my test machine at work is fine
> and has a quick response.  That doesn't seem to be it.  It also has
> the same slow response from his machine to mine and vice versa.
> 
> Could there be something in our local configuration causing extremely
> slow SMTP greetings by sendmail?
> 
> Regards,
> Mojo
> --
> Morris Jones         <*>
> Campbell, CA
> mojo at whiteoaks.com
> http://www.whiteoaks.com



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