OT: but Sendmail experst please help

WILL HALSALL w.halsall at farn-ct.ac.uk
Sat Feb 4 15:11:05 GMT 2006

Hi all, 

I had a test message from maps regarding open relays. Our sendmail will 
accept for deliver messages of the format 
<will.halsall at hotmail.com%fcot5.farn-ct.ac.uk>  but will not accept mail for 
deliver with format <will.halsall at hotmail.com>. 

could one of the sendmail experts please explain how to stop this? below is 
the telnet session 




ehlo fcot5.farn-ct.ac.uk
220 fcot5.farn-ct.ac.uk ESMTP Sendmail 8.13.5/8.13.5; Sat, 4 Feb 2006 
14:50:20 G
250-fcot5.farn-ct.ac.uk Hello [], pleased to meet you
250 HELP
250 2.1.0 <w.halsall at farn-ct.ac.uk>... Sender ok
rcpt to:<will.halsall at hotmail.com>
450 4.4.0 <will.halsall at hotmail.com>... Relaying temporarily denied. Cannot 
lve PTR record for
rcpt to:<will.halsall at hotmail.com%fcot5.farn-ct.ac.uk>
250 2.1.5 <will.halsall at hotmail.com%fcot5.farn-ct.ac.uk>... Recipient ok 

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