Network Administrator
Service Codes
When a communication error occurs, print the Activity
Report. Use the report to find the service code for the error.
There are two types of service codes.
SMTP
POP3
SMTP Error Codes
Here is the format for SMTP communication service codes.
E123
E = SMTP communication
123 = three-digit SMTP error code defined by RFC.
RFC is an Internet "standards" term meaning "Request
For Comment". RFCs are documents that define
standards or proposed standard-definitions for network
and Internet operation. Individual RFCs define specific
aspects of network or Internet operation.
Numbers 900 and above are codes defined specifically for
this Internet Fax.
T.37 Option Guide: English
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