For blocking .zip attachments you will want to use the "Account Level Filtering" area of your control panel. Create a Rule for Body contains .zip
Action can be "Fail with message: This user doesn't accept .zip attachments."
You can use this method for any file extension. For example blocking .rar attachments use the "Account Level Filtering" and create a rule for Body contains .rar
You may receive the following error message. "Domain has exceeded the max defers and failures per...
For webmail, make sure you are using the proper account name when logging in. For webmail it is...
There are several reasons why you may not be able to connect to the POP3 server, and thus, not be...
The connection to the server has failed. First make sure you are using the proper format:...
The default forwarding method of Mozilla Thunderbird can result in servers blocking emails as...
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