Am Mi, den 12.04.2006 schrieb Thomas E Dukes um 2:23:
> Here'sanother bounce email:
>
> The original message was received at Tue, 11 Apr 2006 19:16:44 -0400 from
> localhost.localdomain [127.0.0.1]
>
> ----- The following addresses had permanent fatal errors -----
> <xxxxxx@xxxxxxxxxxx>
> (reason: 521-EHLO/HELO from sender 71.31.91.127 does not map to
> localhost.localdomain in DNS)
>
> ----- Transcript of session follows ----- ... while talking to
> gateway-s.comcast.net.:
> >>> MAIL From:<apache@xxxxxxxxxxxxxxxxxxxxx> SIZE=2176
> <<< 521-EHLO/HELO from sender 71.31.91.127 does not map to
> localhost.localdomain in DNS <<< 521-sending machine name must be provided
> as a fully <<< 521-qualified domain via EHLO/HELO command.
> <<< 521-see section 4.1.1.1 and 4.1.4 of RFC 2821 <<< 521 521: Comcast
> requires that all mail servers must have a PTR record with a valid Reverse
> DNS entry. Currently your mailserver does not fill that requirement. For
> more information, refer to:
> http://www.comcast.net/help/faq/index.jsp?faq=Email118405
> 554 5.0.0 Service unavailable
2 things:
1) Your mail host at that time of the mail had the hostname
localhost.localdomain, thus your Sendmail used it for EHLO/HELO. You
fixed that meanwhile
2) The remote side requires not only a valid forward DNS record
(palmettodomains.com points to that IP) but too a matching reverse one.
