DNSstuff.com test results

Out of curiosity, I ran my Dreamhosted domain names against the DNS report tool at DNSstuff.com.

The reports came up mostly clean except for a couple of issues I can fix myself - it’s a useful tool for an amateur.

However, there was one issue that is part of Dreamhost’s setup.

This warning follows:

Mail server host name in greeting WARNING:

One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record.

mx2.sub3.homie.mail.dreamhost.com claims to be host homiemail-mx8.g.dreamhost.com [but that host is at (may be cached), not].

I don’t think anything needs to be fixed here; I’m just curious as to what is going on.

The message suggests that DNS caching is behind this. True, false or who cares?

Thanks in advance,