Re: Unable to receive e-mail messages from certain sites with reve

Tech-Archive recommends: Fix windows errors by optimizing your registry

I just checked my badmail and the missing messages are not in there. I
turned off the check reverse DNS on incoming mail on the default SMTP server,
restarted the default SMTP server and sent a test e-mail to one of the
problem sites asking them for a reply. They can receive, but they are not
able to save the message. I waited 15 minutes, then re-enabled the reverse
DNS checking.

Any more Ideas?

Thanks,
Allen


--
It sure would be nice if Microsoft had some sort of QA procedure on their
white papers and KB articles!


"John Oliver, Jr. [MVP]" wrote:

> The only place I would think these messages would show up is in the Bad Mail
> Folder, have you checked it?
>
> --
> John Oliver, Jr.
> MCSE, MCT, CCNA, Exchange MVP
> Microsoft Certified Partner
>
> "Allen Clark" <nospamacent1@xxxxxxxxxxxxxxxx> wrote in message
> news:E490F23C-7E59-4262-B3CC-20A449176853@xxxxxxxxxxxxxxxx
> > Thanks for the reply. I have verified that Symantec is NOT blocking ANY
> > spam. Is there a way to have exchange log the messages that are trashed
> > because of a failed reverse DNS lookup. I don't want to disable the
> > reverse
> > DNS lookup because I will be buried with questions from users saying "Why
> > did
> > I get all of these spam messages?" even if I send them all an e-mail
> > indicating the test procedures being used.
> >
> > Simply put:
> >
> > Symantec is NOT blocking ANY spam.
> >
> > Is there a way to have Exchange log the messages that are being trashed
> > due
> > to failed reverse DNS lookup?
> >
> > Thanks in advance,
> > Allen
> >
> > --
> > It sure would be nice if Microsoft had some sort of QA procedure on their
> > white papers and KB articles!
> >
> >
> > "John Oliver, Jr. [MVP]" wrote:
> >
> >> I have you tried just disabling temporarily the Reverse DNS setting to
> >> see
> >> if the mail gets through? Also check your settings on the Symantec Mail
> >> Security as it maybe catching that mail as spam.
> >>
> >> --
> >> John Oliver, Jr.
> >> MCSE, MCT, CCNA, Exchange MVP
> >> Microsoft Certified Partner
> >>
> >> "Allen Clark" <nospamacent1@xxxxxxxxxxxxxxxx> wrote in message
> >> news:6E574CE7-1007-4CB9-B55C-1357A547A8F4@xxxxxxxxxxxxxxxx
> >> > We have a simple Exchange 2000 configuration. One Exchange server 2000
> >> > running on a single Windows 2000 server. DSL connection with static IP
> >> > address, host, mx, and reverse DNS all properly configured. Firewall
> >> > device
> >> > that routes all SMTP traffic to the Exchange server from our public IP
> >> > address. In order to cut down on the amount of SPAM received, we have
> >> > enabled the reverse DNS checking to validate e-mail messages coming
> >> > into
> >> > our
> >> > server. We also run the Symantec Enterprise Edition 10.0 AV which
> >> > includes
> >> > the Symantec Mail Security for Exchange. The problem we are
> >> > experiencing
> >> > is
> >> > that a few senders are unable to send to our server from other sites.
> >> > Our
> >> > bank, ChevyChaseBank, and Pepco, both have individuals that have tried
> >> > to
> >> > send e-mail to us, but they never get thru. We can send to them
> >> > without a
> >> > problem, but they cannot reply or send to us. I have checked the SMS4E
> >> > logs
> >> > and have nothing enabled for antispam, only AV protection. The only
> >> > protection we have for spam is the server setting to check reverse DNS.
> >> > How
> >> > can I go about troubleshooting this message. I had read that when a
> >> > message
> >> > fails reverse DNS lookup, it is deleted and there is nothing logged.
> >> > Is
> >> > this
> >> > true? If not, where can I see what messages are being deleted due to
> >> > the
> >> > reverse DNS resolution failure?
> >> >
> >> > Thanks,
> >> > Allen
> >> >
> >> > --
> >> > It sure would be nice if Microsoft had some sort of QA procedure on
> >> > their
> >> > white papers and KB articles!
> >>
> >>
> >>
>
>
>
.

Relevant Pages

  • Re: Basic Questions about Reverse DNS
    ... Your Email SMTP server can report any name ... Every example I've seen of Reverse DNS shows only one hostname per IP ... You should only have a single reverse DNS entry for each IP address. ...
    (microsoft.public.windows.server.dns)
  • Re: educating rDNS violators
    ... but have a reverse DNS entry that points to ... the smtp server to the domain name in the email address. ... filtering out mail from servers with a bad rDNS ...
    (Security-Basics)
  • Re: Reverse DNS
    ... to have the same IP address associated with many A records, only one PTR ... What your ISP is doing is allowing ... there is a choice of only setting up reverse DNS on the IP ... name to match the HELO name of the SMTP server no matter ...
    (microsoft.public.windows.server.dns)
  • Re: Basic Questions about Reverse DNS
    ... reverse DNS, I don't see how it can effectively prevent spam. ... Your Email SMTP server can report any name ... You should only have a single reverse DNS entry for each IP address. ...
    (microsoft.public.windows.server.dns)
  • Re: Basic Questions about Reverse DNS
    ... reverse DNS, I don't see how it can effectively prevent spam. ... Your Email SMTP server can report any name ... Every example I've seen of Reverse DNS shows only one hostname per IP ... You should only have a single reverse DNS entry for each IP address. ...
    (microsoft.public.windows.server.dns)