Microsoft Outlook

Articles

 Reasons for email duplication

Email duplication will slow down Outlook, your email server and lead to more complex issues. In...

 Reasons why Outlook sends duplicates

The main reasons why emails send you duplicates are as per below: Duplicate email #1 – a message...

 Sending E-Mail - 503 Valid RCPT command must precede DATA

The 503 Valid RCPT commands must precede DATA error in Microsoft Outlook is a fairly common error...

 Sending E-Mail - Relay Access Denied, Relaying prohibited or Unable to relay

There are two reasons why this would occur: 1. Incorrect login details: If you are sending...