Used to check if the string is contained in the specified field of a message header.

This criterion is NOT met if data...

True, if criterion condition is NOT met.

Header field

Set name of the header field where the string is to be searched for. For example, for message subject it will be the Subject field, for sending date - the Date field.

Contain string

The string to be contained in the message header field.

Whole String

Message header field is checked for being completely the same as the filter string.

Match Case

Case-sensitive string comparing.

Use Wildcards

Filter string contains wildcards.

Use Regular Expressions

Filter string contains regular expressions.

Remarks

For detailed information about e-mail header field names and contents see RFC822.