Problem:
Fax Server - "Processed -502 messages but returned error -502 -
Server unreachable (Mail Server) for the 0 in the batch" Message Appears in Windows Application Log.
Summary:
In Fax Server, RightFax Edition, using the RightFax Email Gateway, you
may see the following event logged repeatedly in your Windows
Application Log. Why does this error message appear, and how do you
resolve it?
Error Message:
In Windows Application Log:
Event Type: Warning
Event Source: RightFax E-mail Gateway Module
Event Category: None
Event ID: 3317
Date: Date Value
Time: Time Value
User: N/A
Computer: ServerName
Description: CPTF:Processed -502 messages but returned error -502 - Server unreachable: (Mail Server) for the 0 in the batch
Cause:
The RightFax Email Gateway is configured for SMTP, with a delivery direction of outbound, but no valid POP3 account details have been configured.
Solution:
Do not configure the RightFax Email Gateway for SMTP with a delivery direction of Outbound with Notifications if you are not sending outbound emails to Fax, or when no valid POP3 account information is configured.
If the Gateway is being used only for notifications, set the delivery direction to Inbound (not Outbound with Notifications). Notifications are considered inbound messages, so this is the correct delivery direction configuration to route them to users' mail boxes.
Contact the Fax Server Experts for your support related issues
For more Information see post at the following link: Fax Server Software by RightFax
