Knowledgebase

Trouble Sending Email
If you are having trouble sending email from within an email  such as Outlook, Thunderbird,...

<550 error> appears when sending to outside address
A 550 error indicates that the mail server returning the error cannot find the address to which...

Time-out error message
If the error code is accompanied by a time-out error message, you may be able to resolve this...

How to Block a Sender on Microsoft Outlook or Windows mail ?
Many emails are sent every day. Some of them are not welcome. If you find many of these unwanted...

Receiving << Mail Delivery Failed System >> fake Emails Problem
If you receive hundreds of Mail delivery failed system fake Emails,so we need to know why this...

ESET Outlook Plugin error when starting Microsoft Outlook
If you receive the following error message when starting Microsoft Outlook,The Add-in 'ESET...

Error: "Your server has unexpectedly terminated the connection"
When you attempt to send or receive email, you see one of the following error messages: "Your...