- Open Apple Mail.
- Click the Mail menu and click Preferences.
- Select your mail account on the left under Accounts, then click the Advanced tab.
- Confirm the check box labeled "use SSL" is not checked next to ports. If necessary remove the checkmark.
- Click the Account Information tab and select Edit Server list from the drop down next to Outgoing Mail Server.
- Click the Advanced tab and confirm there is not a checkmark next to Use Secure Socket Layer(SSL).
- Click OK and close the accounts. Window and choose to save.
- Click Save to update your settings.
- Restart Apple Mail.
Knowledgebase
To disable/turn off SSL in Mac Mail you need to complete the following steps:
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