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How to fix AT&T error code 553?
Contact ATT Customer Care Phone Number
Is your system displaying AT&T error code 553 and you are looking for a solution to get rid of this error? You can follow the steps given below and make sure that you keep the guidelines in mind for future purposes. You can always dial Contact AT&T Customer Care Phone Number if you need clarifications for the same.
• Verify that the email address that you are entering in the required field is properly authenticated and is correct.
• Ensure that the IMAP and POP settings while configuring AT&T and Outlook emails are correct.
• Check for internet connectivity issues and resolve it accordingly.
• Refresh the web browser.

Read More: https://www.customer-carehelpline.com/att-technical-support.php

Olivia Zoe 06/04/2019 11:44

Replies:
Adrian Gates 05/29/2020 16:15
Causes behind AT&T error code 553;

There are certain reasons as to why 553 error code in AT&T emails occur, and some of them are discussed in brief below.

If the incoming and outgoing server settings are not appropriate, this error can be induced any time.
Adding an incorrect email in the recipient field.
When you are attempting to send various emails together.
If the email account to which you are sending the mails is found unauthenticated.
When the senders and the receivers account is not distinct.
The server doesn’t support the email settings or the specified connection encryption type.
The various symptoms which show AT&T error code 553

When you are not able to send mails or receive mails from the mail recipients.
The email account cannot be accessed properly.
The messages get blocked all of a sudden
Error message displaying on the screen
What are the ways by which this error can be fixed?

Make sure that you are entering the valid and authenticated email address in the required field.
Verify if the device is facing with any internet troubles. If yes, fix them immediately.
Refresh the home browser and then send the mails.
Ensure that the server settings are correct and if not then enable them accordingly by appropriately configuring the IMAP and POP settings
Delete the browser’s cookies, cache, and history.