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*Help! Certain clients don't receive my emails?* :(
#3

http://www.internovations.com/service-email-blast.asp - sounds it.

 

Many ISPs use throttling and rate-limiting measures on their mail servers to prevent them from being overloaded by incoming floods. This defeats trojaned machines mass-spamming their customers, but also works the other way by preventing infected customers from spewing out infected attachments of their own.

 

If you're using outcrock to connect directly to your ISP, try flicking on verbose logging options and checking to see what that audit trail shows. If you can identify some of the mails by a unique ID within their headers[1] then your ISP could verify their mail logs and see if it was accepted, relayed or silently discarded (which many rate-throttlers do to prevent fake bounceback).

 

If you're running a mail server of your own, then check those logs - but you've not indicated you are.

 

[1] as far as I recall, Outpuke makes information like this difficult to find, presumably on the grounds that useful diagnostic information is considered way above the knowledge levels of their users and would only confuse them. Good luck with finding it.

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*Help! Certain clients don't receive my emails?* :( - by Dungeon-Dave - 2009-02-11, 08:09 PM

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