POP3 UIDL - Windows Live Hotmail

I have just discovered that Hotmail finally allows POP3 access. I had been playing around with HttpMail plug-in until now.

When setting up POP3 for a friend, it removed the messages from the server, as I could see the messages were no longer accessible on the web-mail client.

I feared setting up this POP3 option on Hotmail would do the same. I then read this:

"Although most clients have an option to leave mail on server, e-mail clients using POP3 generally connect, retrieve all messages, store them on the user's PC as new messages, delete them from the server, and then disconnect." "Clients with a leave mail on server option generally use the POP3 UIDL (Unique IDentification Listing) command. Most POP3 commands identify specific messages by their ordinal number on the mail server. This creates a problem for a client intending to leave messages on the server, since these message numbers may change from one connection to the server to another. For example if a mailbox contains five messages at last connect, and a different client then deletes message #3, the next connecting user will find the last two messages' numbers decremented by one. UIDL provides a mechanism to avoid these numbering issues. The server assigns a string of characters as a permanent and unique ID for the message. When a POP3-compatible e-mail client connects to the server, it can use the UIDL command to get the current mapping from these message IDs to the ordinal message numbers. The client can then use this mapping to determine which messages it has yet to download, which saves time when downloading."

http://en.wikipedia.org/wiki/PostOfficeProtocol

Is this an option that is available on a e-mail provider specific basis, or is it something I activate from within the e-mail program, or within my providers settings. Or is it some sort of setting option?

I understand what is being explained, yet I do not know how to utilise the function, if at all possible.

http://windowslivehelp.com/solutions/settings/archive/2009/01/06/send-and-receiv e-windows-live-hotmail-emails-from-a-mail-client.aspx

Ultimately I have always wanted to use Apple Mail for my e-mail needs, however I wish to have them backed up on the server and accessible via web-mail too.

Kind regards,

Jamie Claughton

iBook G4 1GHz, Mac OS X (10.4.11)

Posted on Apr 3, 2009 8:17 PM

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Posted on Apr 4, 2009 12:11 PM

Hi Jamie,

Not sure if Mail does use UIDL or not, I haven't noticed any skipping as I use POP3 and at home it leaves it on the Server, at work it removes it once downloaded, but then I'm not using Hotmail.

As a side note, Eudora, which is my real eMail client, (I begrudgingly use Apple's Mail in an effort to help out here), but anyway, Eudora displays it is sending the UIDL command every time it collects POP3 mail.
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Question marked as ⚠️ Top-ranking reply

Apr 4, 2009 12:11 PM in response to Jamie Claughton

Hi Jamie,

Not sure if Mail does use UIDL or not, I haven't noticed any skipping as I use POP3 and at home it leaves it on the Server, at work it removes it once downloaded, but then I'm not using Hotmail.

As a side note, Eudora, which is my real eMail client, (I begrudgingly use Apple's Mail in an effort to help out here), but anyway, Eudora displays it is sending the UIDL command every time it collects POP3 mail.
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POP3 UIDL - Windows Live Hotmail

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