Plaintext Authentication Not Allowed (Using Secure Mode When Checking Email)

If you are having problems logging into your email through Outlook, Thunderbird or other Mail Client, please check that the SSL/TLS is enabled.

Due to some recent changes with PCI Compliance Regulation we are being forced to disable the Plaintext Authentication on POP3 and IMAP. In your mail programs (Outlook, Thunderbird, Mail etc) you must change the settings for the Authentication Connection so that you're using SSL / TLS connection method. Upon doing this, you will also need to change the Server Connection so that it lists your domain name (if you have an SSL installed on your site) or set it to your current server's hostname. 

Once this change is made, your POP3 or IMAP mail will work without any issue.

Reviewed : 11/13/2016

  • Email, SSL
  • 9 Users Found This Useful
Was this answer helpful?

Related Articles

How to setup an Email Account in Mozilla Thunderbird email client.

The following instructions will walk you through setting up an Email account through the Mozilla...

Will I lose email when I transfer my hosting to Total Server Solutions?

As some email could be delieverd to your old host while the domain is updating, you'll want to...

Is there a limit on how many emails I can send?

The server has a limit on the number of emails that it will allow to be sent in a given hour. The...

Mail Error: 451 Could not verify sender

Problem: You recieve the error mesage "451 Could not complete sender verify callout". Reason:...

Creating an email account in cPanel

1) Log into your cPanel account2) Click on "Email Accounts" under the Mail section:3) Type the...