Hi RonB6123,
Welcome to the Apple Support Communities. It looks like you're unable to send or receive email from your Mac.com address.
To start, there are a few steps here that may help with an offline iCloud/Mac.com address, found in the resource titled
Get help using iCloud Mail
:
Find the name of your iCloud email account on the left side of the main Mail window. If your account name is dimmed and has a lightning-bolt symbol next to it, your account is offline. To take your account online, connect to the Internet, then choose Mailbox > Take All Accounts Online.
“This message could not be delivered and will remain in your Outbox until it can be delivered. The reason for the failure is: An error occurred while delivering this message via the smtp server: server name.”
- Open Mail and choose Mail > Preferences.
- Click the Accounts tab.
- Select your iCloud email account.
- Click the Account Information tab.
- Choose your iCloud email account from the Outgoing Mail Server (SMTP) menu. If you choose Edit SMTP Server List, you won't see your iCloud SMTP server as an option.
If neither of these steps resolves the issue, these are your next best steps, from the article
If you can’t send or receive email on your Mac
:
Mail might say that your account appears to be offline due to a network problem.
If you're connected to the Internet but your account appears to be offline, your email settings might no longer be correct. To view your current settings in Mail, choose Preferences from the Mail menu, click Accounts, then select your email account.
- Make sure that you installed the latest Mac software updates, especially if the issue occured immediately after installing a previous update.
- In OS X El Capitan or later, you might see a status icon and brief error message in the upper-right corner of the Mail window, beneath the Search field. The message might say “Network Offline” or “Login Failed,” for example. Click the message to see more details about the issue.
- Check your connection in Mail Connection Doctor. It might be able to tell you more about the issue.
Checking Mail Connection Doctor as described above is a great idea to get more information about what could be causing this for your account.
Also, for clarification, you mentioned you made the account inactive. What steps did you use for this? If the steps above don't resolve the issue, try clicking the Apple menu () > System Preferences > iCloud. Then, uncheck the box next to Mail, wait a few minutes, and re-check it.
I hope this helps you.
Take care!
