NANOG58 bad helo for hotel reservation emails

Robert Drake rdrake at
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[]: 
450 4.7.1 <>: Helo command rejected: Host not 
found; from=<waldorfastoriahotels&resorts at> to=<excised> 
proto=ESMTP helo=<>

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

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