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I have many email accounts -- couldn't live without this!.
There's not one email account of mine that I cannot add. It's incredibly customizable. I can pick up each account at different time intervals and decide if they are part of the AllAccounts view. Very helpful. I have depended on this program for many years now and each update makes it better.
Pros: All email accounts in one place.
Cons: Inability to add custom notes.