we have the same sort of authority issues here. there are sites that my boss tells me to check out but the network folks have them blocked so i have to do it at home because unblocking takes an act of some supreme being that i haven't been able to identify.
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Cassidy, Alan
Sent: Thursday, May 15, 2008 10:59 AM
To: Midrange Systems Technical Discussion
Subject: RE: verify an email address
If the email server is in-house and you're just checking email addresses
for your own company (or whatever "turf"), another way is to use LDAP
client API's to verify the addresses directly, as long as the email
server supports LDAP. Microsoft Exchange does.
Using Scott Klement's excellent and clear guide to using LDAP and the
one API for doing this specifically, I tried to implement this a year or
two back. I'm sure my API calls were good, but after much ado I found
there were /authority/ issues. It's sticky, and the Windowers at my shop
were so coy with the permissions, try this and that first, that as soon
as I discovered they already had a white list going out to their
ISP/mail provider, I gave them an FTP script to schedule it to go to our
systems....
Another alternative is a command that will generate a good list, called
something like ldapdiff or some such.
--Alan
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Bill Meecham
Sent: Thursday, May 15, 2008 10:29 AM
To: 'Midrange Systems Technical Discussion'
Subject: RE: verify an email address
thank you Walden, and Jonathan!
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Walden H. Leverich
Sent: Thursday, May 15, 2008 10:05 AM
To: Midrange Systems Technical Discussion
Subject: RE: verify an email address
is there a way to check that an email address is valid from the
midrange side?
Short answer, no. You can't rely on bounces (and if you could, they
could take a while), you can't rely on VRFY or EXPN as they're blocked
in most places, and even RCPT TO isn't guaranteed to tell you if the
address is valid since a relay may accept the mail message and then
later bounce it.
Depending on the need you could send an email to the address asking the
recipient to take an action (click a link in the email). Then you know
not only that the address exists, but that it belongs to the recipient.
-Walden
--
Walden H Leverich III
Tech Software
(516) 627-3800 x3051
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com
Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)
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