
IF IT DOES NOT WORK, PLEASE LET ME KNOW BY REPLYING TO THIS THREAD! WE'LL GET THROUGH THIS HICCUP!īe advised: this is a workaround for Mail.app on OS X Yosemite PB3. ğix the address to reflect your real address 'Continue' and it should now all work.

Hit 'Back' 2 times until you reach the starting window where you first entered the fake address. DO NOT HIT 'CONTINUE'! If you do, you will have to delete the account and start over.

Step 3: THIS IS CRUCIAL: Now, you should see the 'Account Summary' window with the fake email address. Messages larger than 10 MB will be rejected by the Server. In my situation dealing with Office 365, it was ''. you do it in terminal OS X Server: Adjusting message size limits for the Mail service In OS X Server (Mountain Lion) and OS X Server (Mavericks), the default Mail service configuration limits delivery of messages to 10 MB or less. In the 'Server Address' box: enter the Exchange IMAP address. Your 'Password' should already be filled in with what you entered in the previous window. In the 'User Name' box: enter the full, real email address. Step 2: Now, you should see the 'Account Settings' window.

In the 'Email Address' box: add your email address with a misspelling in the domain section (e.g., instead of enter it as This will force Mail to "auto-discover" for the 'Password' box: enter your real password for your actual email address. In the 'Name' box: add whatever name you want. Step 1: System Preferences > Internet Accounts > Exchange: To get around the Exchange error in OS X Yosemite's Mail.app client, you must trick the system's auto-discovery mechanism.
