Overview

Our email servers may direct you to this page for more information regarding an error. Please see below for the message that matches the error you have.

Error Codes

CA1

his suggests that you are sending email through smtp.aa.net.uk with authentication. but the system has detected a high amount of invalid email addresses that the account is sending email to. Feature added December 2013. There are 2 main reasons for this:

Possible Compromised Account?

The account may be compromised and a third party may be using your account to send lots of junk email. Typically a junk sender will send lots of emails and many will be to invalid addresses. To help prevent spam we have blocked the account from sending further email. Please contact support for more details, we would request you to change your email password before we unblock the account.

Sending to a Mailing list with invalid addresses?

It may be that the account has been blocked as you have a mailing list that you send email to that has many invalid email addresses. When you send email to invalid addresses you would get a bounce back message. It is normal practice to then remove these invalid email addresses from your databases. In this case, ask Support to unblock the account.