How to Fix Xfinity Comcast Email Sign in Errors?

Xfinity Comcast Email Sign in Errors

Comcast is one of the leading email service providers. Using Comcast email, you can conveniently send and receive your emails. Xfinity Comcast is designed for PC and Mac devices, Android phones, iPhones, etc. You can configure the Xfinity Comcast account to Outlook to avoid the hassle of managing multiple accounts in different locations. However, you need to be aware that there is no email service that is entirely free from errors and technical glitches. The errors occur here and there due to known and unknown reasons. Here, we will be discussing some of the troubleshooting steps which will help you fix the Xfinity Comcast email sign-in errors.

Before going to the troubleshooting steps, verify the incoming and outgoing mail server settings.


  1. The Incoming Mail Server Host Name:
  2. Username: Type the username of your Xfinity email account.
  3. Password: Type the correct Xfinity password.
  4. Incoming Mail Server Port: 993
  5. Use SSL: ON
  6. Authentication method: STARTTLS


  1. The Outgoing Mail Server Host Name:
  2. Username: Enter the username of your Xfinity email account.
  3. Password: Type the Xfinity password.
  4. Outgoing Mail Server Port: 587 (SMTP) or 465 (SMTPS)
  5. Use SSL: Yes
  6. Encryption: TLS or SSL


  1. As the first step, update your default web browser to its latest version, as updating will usually resolve most of the known and unknown errors.
  2. Confirm that you have entered the correct login details for your Comcast email account.
  3. If you have enabled the auto-fill option on your browser, then make sure that it is not entering any old password. You can disable the auto-fill option and enter the password manually.
  4. Ensure that the NUMLOCK and CAPSLOCK keys are off while filling in your login credentials.
  5. Avoid copy-pasting your password, as there is a possibility of including a space at the beginning or end of the password while copy-pasting.
  6. You can even use a different browser or device to log in to the Xfinity Comcast account.
  7. Sometimes, a poor Internet connection can create sign-in errors on your Xfinity Comcast email account. Therefore, to access the Xfinity mail account, you need a high-speed Internet connection without any delay in signals.
  8. The issue in your server settings is one of the reasons for the sign-in errors. So, ensure that you enter the correct settings for both incoming and outgoing servers using the information provided previously.
  9. In some instances, antivirus programs installed on your system can interfere with the Xfinity Comcast account settings. So, disable the antivirus software and then try to access the Xfinity Comcast email account once again.
  10. Now, check whether the Xfinity Comcast email sign-in errors persist.
  11. In case none of the above troubleshooting steps solve your problem, then check out the next segment.


  1. As the last step, you can change the Username and Password of your Xfinity Comcast email account.
  2. For doing this, visit the official Comcast website.
  3. Follow the on-screen instructions and reset your username and password.

So, these are the troubleshooting steps to solve your Xfinity Comcast email sign-in errors. If you are still facing sign-in errors, you may be dealing with a more serious problem requiring technical support assistance. You can reach us for more clarification and assistance by clicking on the CALL button on this page.