WARNING: Ignoring deprecated option --unzip

Julian Field MailScanner at ecs.soton.ac.uk
Mon Jan 26 19:14:53 GMT 2009

On 26/1/09 18:23, Kevin Miller wrote:
> -----Original Message-----
>> its really strange that's all, the system is easily managing to
>> keep up now but telnet to 25 is still really slow to respond,
>> like 5 - 10 seconds or it'll time out completely.  I noticed my
>> mailscanner sql db is getting a bit fat so maybe this is causing
>> some problem...
> Getting into the game late here, so maybe it's been asked already, but
> are you running a caching DNS server on the box?  That may help.
> Too, I've seen telnet spin it's wheels when there was no reverse zone
> for the source (i.e., your) host.  You don't actualy need a reverse
> entry for your host if you don't have one, but having even a single
> entry in the reverse zone allows the name server to return a 'not found'
> almost instantly, whereas it seems to wait to timeout if no reverse zone
> exists...
Yes, that's exactly what I was going to suggest. If telnet 25 produces a 
long delay before giving a sendmail welcome prompt, it's a *sure* sign 
of trouble resolving DNS names, as sendmail does forward and reverse 
lookups on your address to work out who you are before it talks to you.


Julian Field MEng CITP CEng
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Contact me at Jules at Jules.FM

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