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Subject Topic: Multiple POP3-Clients on single account Post ReplyPost New Topic
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Guenther
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Joined: 24 March 2009
Location: Austria
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Posted: 24 March 2009 at 2:35am | IP Logged Quote Guenther
Hello,

one quick question:
Is it save for a client to rely on "MailMessage.IndexOnServer" received from the server?
The reason is: I begin downloading the message headers for all emails, trying to figure out which emails actually had been sent to a certain email-address (it's a catch-all email account) and thus have to be downloaded. After that, i start downloading the entire message for this "MailMessage.IndexOnServer" and deleting it afterwards.
Now, could it happen that meanwhile some other client downloaded and deleted the very first message? And wouldn't that mean, that my "IndexOnServer" has changed (say from 8 to 7) therefore?
Or is it guaranteed, that for a single POP3-Session the index never changes?

Thanks in advance!
Guenther
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Igor
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Joined: 24 June 2008
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Posted: 24 March 2009 at 4:30am | IP Logged Quote Igor
When you start POP3 session, you get a snapshot of Inbox folder and you work with it during the session, indexes will not change until you disconnect from POP3 server.

With regard to removing messages from within another POP3 session, this depends on particular mail server configuration. Most probably, if the message was deleted in other session, you'll get an exception while trying to access that message.

Regards,
Igor
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Guenther
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Joined: 24 March 2009
Location: Austria
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Posted: 24 March 2009 at 4:52am | IP Logged Quote Guenther
Thanks for your quick answer!
I read in the RFC something about a "transaction mode", but was not sure if this means what i predicted to be.
Thank you again for clearing this up!
By the way: Your POP3-Component really rocks

Regards,
Guenther
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