The problem is compounded by the fact that when you are frequently offline, Mail seems to do a somewhat bad job at actually sending things when you do come back online. Or so one might suspect, but it's hard to verify and even harder to report bugs when the outbox isn't visible to show that you've got waiting outbound messages. Mar 26, 2018 Question: Q: Why does my mail keep going offline on my Mac GRRRRR More Less. Apple Footer. This site contains user submitted content, comments and opinions and is for informational purposes only. Apple may provide or recommend responses as a possible solution based on the information provided; every potential issue may involve several factors. Jan 03, 2018 If your SMTP server / Outgoing Mail Account constantly appears 'Offline', here's how to fix it: Close Mail if it's open now. Click the Apple menu (upper left corner of your screen) System Preferences Internet Accounts. Select the account with the broken outgoing mail server, and then click the minus sign at the bottom. Reboot your Mac.
Default Mail App On Mac
Mail User Guide
An email account can be offline (not connected to the internet) if your internet connection is disrupted, a mail server experiences problems, or you purposely take it offline (for example, prior to air travel).
Yahoo Mail App For Mac
In the Mail app on your Mac, do one of the following:
Take accounts online: Choose Mailbox > Take All Accounts Online or Mailbox > Online Status > Take [specific account] Online.
Take accounts offline: Choose Mailbox > Take All Accounts Offline or Mailbox > Online Status > Take [specific account] Offline.
When your account is offline you can’t get or send messages, but you can write messages to send later. You can save your message as a draft and send it when your account’s online again; or click Send to let Mail store your message in the Outbox and automatically send it when your account’s online.