NANOG58 bad helo for hotel reservation emails

Tue May 7 23:56:16 UTC 2013

Sorry for the noise, but I thought this might be of interest to anyone 
waiting for their hotel confirmation:

NOQUEUE: reject: RCPT from feport01.hiltonhhonors.net[63.122.201.171]: 
450 4.7.1 <ironport.hhonorscrm.net>: Helo command rejected: Host not 
found; from=<waldorfastoriahotels&resorts at res.hilton.com> to=<excised> 
proto=ESMTP helo=<ironport.hhonorscrm.net>

So if you run your own server and/or are capable of compensating for a 
misconfigured MTA, you should add an exception for 
feport01.hiltonhhonors.net.