-----Original Message----- From: Matus UHLAR - fantomas [mailto:uh...@fantomas.sk] Sent: woensdag 8 april 2009 18:00 To: users@spamassassin.apache.org Subject: Re: Spam Rats - does anyone know them?
> What I am complaining about is that the IP is reported to be dynamic > because it does not have hostname that follows kind of sick rules. Their rules DO seem a mite odd: "Also remember, according to Best Practises, having a reverse DNS that appears to be part of your upstream provider is not good enough for an email server. adsl.23.204.205.upstream.com means that it is an IP address they are responsible for." 'Having a reverse DNS that appears to be part of your upstream provider' as opposed to what exactly? HELO? That's fixed easily enough. :) What they seem to say, if I read them correctly, is that they'll reject when it looks to be from a dynamic pool belonging to upstream.com. > If I send mail from host fantomas.fantomas.sk, does it follow the rules? As mouss already said, with knowing what the PTR in question is, it's hard to answer this. Looking at your email, I'd say 'fantomas.fantomas.sk' should be okay. It neatly resolves to your IP address, and back; and it's how you identify yourself in HELO. > And if I'd send mail from a0.fantomas.cust.gts.sk, would it? Well, that's the thing, ain't it? As opposed to what? If your PTR were 'a0.fantomas.cust.gts.sk' and you sent mail with HELO 'fantomas.fantomas.sk'? More likely, they'd just reject on the 'cust' part, or the digits. > Even if that record would be listed in SPF? SPF checks against the envelope-from domain part (or HELO, in certain circumstances). So, with SPF you could authorize 'a0.fantomas.cust.gts.sk' to send mail on behalf of 'fantomas.sk', but that will not prevent Spam Rats from identifying 'a0.fantomas.cust.gts.sk' as appearing to be part of your upstream provider; so they'd probably reject the connection anyway. - Mark
