So, I have two macs connected to the same internet connection via a router. I have my email account set up in mail.app on both computers. However, only one of the computers can send email via mail.app. They both have all the settings put in correctly. If I remove the account from the computer that doesn't work and add it again, then it'll work and the other one won't. Can they not both be synced to the server and work correctly? My iPhone and my Mac both sync to the Gmail server and to the server of my other email address, and any action I take in a mailbox either in mail.app, on gmail.com, or on the iPhone, affects both other locations. It's all synced up perfectly. Is it possible to have such a setup between two macs on the same internet connection?