El Capitan 10.11.3 mail accounts will not go online

Hi Keith,

Thank you for visiting Apple Support Communities.

If your accounts in Mail appear to be offline, start with these tips from If you can’t send or receive email on your Mac:

If Mail says that your account appears to be offline

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.

OS X automatically uses the correct account settings for many email providers. You can use Mail Settings Lookup to view those settings, or get the settings directly from your email provider. Then compare them to the settings you see in Mail preferences.

Sincerely.