1. If you can receive but not send then you have a bad SMTP configuration
2. If you can send but not receive you have a bad POP or IMAP configuration
You can try re-entering info.
You can delete account and create a new one.
Using copy/paste can result in an extra space being added. Type carefully.
Check your Keychain for corruption.
Check under advanced settings. Most ISPs require advanced settings now for
SMTP. Check the website for exact info on SSL and ports.
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