Re[2]: Help - How to unwind an SRS address?

Hi,

Relatedly - is there any way or regexp to recognize an SRS rewritten
address?  At what stage to I discard the envelope senders address and
resort to the "From:" header?  I note from inspecting my logs that
"SRS0" appears to precede what looks like rewritten addresses, but
that "=" is not always the next character - surely there must be some
way?  I admit that not many of my customers probably have email
addresses starting with "SRSn" but with free webmail accounts forcing
people to pick random email addresses, assuming isn't really a great
plan.  Why is this so hard?

Kind Regards,
Chris Drake

Sunday, November 21, 2004, 7:44:07 AM, you wrote:

TL> AAddresses in the form of:

>>     SRS0=key@domain-part
>>
>>Are only used in the database variant of SRS. Those, of course, cannot
>>be reversed. :)
>>
>>If you're a large ISP, sending millions of emails out a day, I reckon
>>that the database variant soon becomes impractial, though, as you need
>>to keep all those addresses in the DB, for at least several days!
>>
>>But yes, database addresses cannot be reversed in the manner I described.
>>I do not think the OP was referring to those, though.

TL> If the original poster was asking for a way to 100% all the time determine
TL> the original email address from any SRS1 address that may pass through his
TL> system, the answer is "you can't".  Not 100%.  If someone somewhere out
TL> there using database addresses sends an email your way, you aren't going to
TL> be able to decode it.  You can get maybe close to 100%, but not all the way.


TL> --
TL> -- =========================
TL>     Tom Lahti
TL>     Tx3 Online Services

TL>     (888)4-TX3-SVC (489-3782)
TL>     http://www.tx3.net/
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