NANOG58 bad helo for hotel reservation emails

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&> 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

Checking for a non resolvable HELO will get you significant fps. There are
plenty of HELO patterns that can and must be filtered but not this one.