Thanks for the info Kris and John. I have something to work with the ISP now
and somethings I can try on the client. BTW I agree with you on the Outlook
existing comment. I have asked our ISP your questions throught our support
post with them. We'll see what their response is. 


Kris Deugau wrote:
> 
> djjmj wrote:
>> We have been discussing with them since Sept 17th with no fixes yet. Once
>> they found out 
>> Windows Mail Client didn't have an issue they have been unwilling to
>> help.
>> "Not a server side problem, your clients are the problem"
> 
> Then tell them you're walking as soon as you find another provider.  I'd 
> be quite happy as a mail/spamfilter admin if Outlook ceased to exist, 
> but it's easily second or third place in mail client popularity. 
> (Outlook Express/Windows Mail is in first;  Thunderbird is the other 
> player in the top three, IMO.)  MS Outlook is a common enough mail 
> client...  and preferred by *business* customers in a high enough 
> percentage... that not supporting it is downright stupid on their part.
> 
> Try enabling SMTP authentication, and possibly switching the outbound 
> port to 587 from the default 25;  most ISPs these days offer some form 
> of authenticated outbound relay that provides some buffer against 
> overscoring in SA.  TBH SA scores of 30+ sound like they've just bumped 
> the score on a couple of rules that target forged Outlook mail, without 
> considering the impact on legitimate relay traffic.
> 
>> John Hardin wrote:
>>> Something you could do is go to one of the various DNSBL websites and 
>>> check whether your internet gateway's public IP address is listed. Your 
>>> ISP may be doing something as simple as treating you as J. Random User 
>>> From The Internet rather than as one of their customers.
> 
>> I requested this information from the ISP last week. There response was
>> "our or your" domain are not black listed. Maybe I'm misunderstanding
>> your
>> ? 
> 
> Yes, you've misunderstood.  John's question was about the IP address you 
> get on your connection;  visiting ipchicken.com (among other 
> possibilities) should tell you what IP your mail is apparently coming 
> "from".
> 
> Your ISP may have mangled their SA config (or just not bothered 
> configuring it properly in the first place) such that parts of their own 
> network used for customer connections aren't being properly bypassed or 
> handled by SA's network tests (among other things).
> 
> Is there any other pattern in the messages that are blocked?  (eg only 
> really short messages, messages with the word "foobar" in the first 
> paragraph, messages with more than five cute-kitten-pictures attached,
> etc)
> 
> (Just for the record, I've seen more and more filtering systems in 
> general pick up on short test messages for no reason I can see - Postini 
> is the big culprit in the mail flow I deal with so far, but I've had 
> occasional reports where other filter systems are involved.  Bleaugh.)
> 
> -kgd
> 
> 
:-):-):-)
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