Starting on 1 february AKO blocks POP and IMAP access to email aggregator sites like BB and Google. The February AKO newsletter has more information but here is an excerpt from it with the critical information.
Originally Posted by Josh_H
Extracted from the February 2008 AKO newsletter #26[FONT=Verdana,Verdana]
"Are you currently using POP to receive your AKO e-mail through other ISP mail systems such as GMail, Earthlink, or Yahoo? If so, then you are creating a security risk and setting up conditions for a possible compromise of your AKO/DKO username and password credentials. [/FONT]
A mail aggregator service typically requires the user to enter in their AKO/DKO credentials and accesses their AKO/DKO mailbox on behalf of the user. This not only creates the potential for a compromise of the user’s AKO/DKO user account and all the data a user has access to, but it also routes official mail to non-official accounts. The auto-forwarding of official mail to non-official accounts or devices is prohibited IAW AR 25-2 para 4-20f(6) and may be punished as a violation as noted in AR 25-2 para 1-5k. Example: forwarding your .mil e-mail to a .com e-mail account To prevent this risk, beginning 1 February, AKO/DKO will begin blocking POP and IMAP access to common email aggregator services such as Google, Blackberry, and others. This will be implemented not only to increase the security posture of AKO/DKO webmail but also to mitigate the potential for possible compromise of AKO/DKO user credentials. "