Hi, On Tue, 10 Aug 2004 22:04:31 -0600 LuKreme <[EMAIL PROTECTED]> wrote:
> On 10 Aug 2004, at 18:32, David B Funk wrote: > > It does have one limitation; the sending mail server needs to have > > a valid R-DNS listing. In this particular case it doesn't so you CANNOT > > use whitelist_from_recvd here. > > Does it simply need to be valid, or does it need to by identical? Often times it just needs to be there. Apparently you can set multiple PTR records for the same IP address but some (many?) resolver libraries won't show more than the first. Note also that a mail server should HELO with a resolvable FQDN, though it doesn't need to match the sender's IP address. > My mail server does double duty as my secondary MX, so the r-DNS for > 64.140.43.68 is ns2.covisp.net instead of mail.covisp.net. Is the fact > that the domain and tld are the same good enugh for > whitelist_from_rcvd? Dunno. Depends on how you write the pattern, I guess. -- Bob
