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Outlook Express

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POP or IMAP?

As a ACC member you may use either POP or IMAP to connect to you mailbox from home via for example the program "Outlook Express". POP and IMAP are diffrent protocols that the mail client uses to connect to our servers.

The common factor is that you have to use the secure socket layer, or SSL to use these protocols, so that the traffic between you client and our servers will be encrypted. All access with plain, non-encrypted protocols are disabled, so be sure that you have checked the SSL-box, or you will not get the mail.

In general, the POP protocol downloads your mail from the server, erases the copys that are on the server and only stores them on your computer. This means that if you also want to download your mail via our webmail, Puss, the mail that you've already downloaded will not be visible. In other words, POP is a good alternative if you only want to store your mail on your computer.

IMAP resembles an FTP, but specially designed for fetching mail. In other words, you can download only the mails you want to read and then read them. After the download, they are still available at the server, so that you can view them with Puss, or if your computer crashes. Some clients also have the ability to synchronize with the mailserver, downloading all messages for you to read even with no connection. Of course, you have to synchronize again to get the new mail. This although makes IMAP work like POP, but the messages remains on the server, until you via the client erase the messages.

One potential problem with IMAP is that your inbox has a limited size. This means that you have to move messages that you want to keep to a folder under your home directory. This can be done via the client. You don't have to worry about loosing any mails because of a filled inbox. We will send annoying mails until you fix it, though.

When you have selected the protocol that fits your needs, continue to the guide where you can get help configuring Outlook Express for POP or IMAP.

POP


Your name..


Your email address, which is YOURUSERNAME@acc.umu.se


Enter pop.acc.umu.se and mail.acc.umu.se.


Enter your username...


Finished (not really).


Need to change some stuff, to into the Tools -> Accounts menu.


Select pop.acc.umu.se and Properties.


Click the Advanced tab and check SSL on Incoming mail. If you leave the "Leave a copy of messages on server" unchecked, all mail will be stored on your computer and you won't be able to access it with our Webmail for instance.

See certificate information at the bottom of this page for information about the encryption certificates.

You are now done. Close all dialogs with the "Ok"-button and click the "Send/Recv" icon in the main application.

IMAP


Your name..


Your email address, which is YOURUSERNAME@acc.umu.se


Enter imap.acc.umu.se and mail.acc.umu.se.


Enter your username...


Finished (not really).


Need to change some stuff, to into the Tools -> Accounts menu.


Select pop.acc.umu.se and Properties.


Click the Advanced tab and check SSL on Incoming mail.


Click the IMAP tab and enter "Mail" in the "Root folder path".

See certificate information at the bottom of this page for information about the encryption certificates.

You are now done. Close all dialogs with the "Ok"-button and click the "Send/Recv" icon in the main application.

Certificate information

The certificates that are used for the encryption are created by a Certificate Authority and unless that CA is told to be trusted, Outlook Express will ask every time whether it is ok or not.

This is how you can verify that you are getting the correct certificate.


Unless you have installed the Certificate Authority, you will get something like this every time.

At ACC we use certificates from the HPC2N at Umeć University system. Start off by downloading their Certificate Authority, download the cacert.crt for Thunderbird and/or cacert.der for Microsoft mail clients. Save the file somewhere on your local computer.


Go to http://www.hpc2n.umu.se/ca/ and click on cacert.der, then Open.


Install Certificate.


Next.


Next.


Finish.


Yes, you want to install the certificate you just downloaded.


Ok.



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This page was last changed by wmaster on 12/03 - 2014.