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
This can occur for several reasons. Make sure you have the proper spelling of the email...
The default forwarding method of Mozilla Thunderbird can result in servers blocking emails as...
A mailing list is a collection of email addresses which are assigned to a single name for faster...
Outlook is trying to use SSL. Go to 'Tools' -> 'Accounts...' -> 'Mail' -> 'Properties'...
When attempting to send email you receive the following message in your mail client software:...
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