On Thu, 11 Dec 2003 11:29:02 -0800, "RD"
<anonymous.DeleteThis@discussions.microsoft.com> wrote:
>Thanks Invotion,
>
>Could you give me a clue as to where I would look for this
>in IIS running on XP Pro? I see that the SMTP setup has a
>reverse DNS lookup for incoming mail, but not for outgoing.
It's not an issue with SMTP, it's the DNS configuration for your
domain, at your ISP. Many ISP's don't configure a reverse DNS for
user accounts, and those that do often use a "PortX.ispdomain.com" DNS
entry anyway. Many SPAM filters will check that your mail is from a
legitiamte source, and a domain that fails to resolve or an IP that
resolves to an incorrect domain will trigger them. Poor or missing MX
records will cause this as well.
Unfortunately, unless you run your own DNS, you can't do much about
it. If your ISP allows it, you can use their mail server as a smart
host, or you can start running your own DNS. That can also be
problematic with a dynamic IP, since you can't guarantee your IP will
match your DNS record at any given moment. Dynamic ISP redirection
services might help, but you may still be having trouble.
As for your question about how people run an SMTP server from their
home -- Most don't.
Jeff
>>-----Original Message-----
>>If you don't have reverse dns set up properly for the
>>sending server most major providers will drop your
>>messages.
>>
>>Sincerely,
>>Invotion Engineering Team
>>Advanced Microsoft Hosting Solutions
>>http://www.Invotion.com
>>
>>>-----Original Message-----
>>>I want to thank Ken and Jeff for responding to my
>>previous
>>>questions about SMTP, but now I've got it figured out.
>>>
>>>The problem is that almost all of the ISP's are blocking
>>>my e-mail because of suspicious headers. I can't get
>>any
>>>details, but Time-Warner roadrunner did tell me that
>>this
>>>was true in their case.
>>>
>>>I have sent e-mails from my own server to several e-mail
>>>accounts and the all get blocked except for yahoo. I've
>>>been told that this is due to increased spam detection.
>>>Yahoo apparently hasn't put increased protection in
>>place
>>>yet.
>>>
>>>roadrunner did tell me that I could contact their
>>security
>>>office and have my outgoing mail unblocked, but that
>>only
>>>solves part of the problem. Ther are so many others
>>that
>>>could be blocking my outgoing mail with my even knowing
>>it.
>>>
>>>How does one run an SMTP server at home? I suspect that
>>I
>>>need to clean up the headers so they aren't suspicious
>>but
>>>I don't have a clue how to do it.
>>>
>>>
>>>
>>>.
>>>
>>.
>><!-- ~MESSAGE_AFTER~ -->
>> Stay informed about: ISPs Blocking SMTP 
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