Question / Problem

An "Invalid address" error appears in the log.

Answer / Solution

Many spam emails contain syntactically invalid email addresses in the from field. Since most SMTP servers (including Exchange Server) refuse messages with invalid from addresses SmartPOP2Exchange gives a warning when it detects such an invalid address.

With SmartPOP2Exchange V7.2 detected invalid sender addresses are automatically replaced with "invalid@address.com".

For older versions you may create a global rule like this: Condition: "Messages with an invalid sender address" --> Action: "Replace sender address with 'postmaster@domain.com'".