In Mac Mail:
- Go to mail/preferences
- Click on accounts tab at top
- Select your email account on left
- Then click the advanced button
- UNCHECK "Use SSL"
- THEN click the account information button
- At bottom in outgoing Mail Server (SMTP) pull the menu down to "edit SMTP list"
- Select your e-mail account in the list
- Select the advanced tab in middle
- Then UNCHECK "Use Secure Socket Layer (SSL)"
- then CLOSE/SAVE
- Open Outlook and click Tools.
- In the Tools menu, select Account Settings.
- Select your email account from the list and click the Change. The email settings are displayed.
- Click the More Settings... button and select the Advanced tab.
- If enabled, remove the checkmarks next to This server requires an encrypted connection(SSL).
- Select the Outgoing tab and place a check next to My outgoing server (SMTP) requires authentication.
- Click OK to update your settings.
- Click Next and then click Finish.