If you want to fix [pii_email_a3f6396e33e19d6404d2] pii_email Error you can follow the step given below:
1. Open the Microsoft Outlook Office
2. Clicks the Tools and then Accounts
3. Go to the Mail option for viewing list of your mailing accounts
4. Click the mail account which have the problem
5. Go to the Advanced option tab
6. Change the “Outgoing mail (SMTP)” from 25 to ###
7. Click on OK and Close
Hopefully above steps will help you to fix the issue if not you can also follow our blog to see more on [pii_email_a3f6396e33e19d6404d2] pii_email Error.