The RFC 822 specification allows for a leading day of the week specification in the date fields in message headers. However, some systems cannot accomodate day of the week information. This makes some systems reluctant to include this information, even though it is quite useful information to have in the headers.
control PMDF's processing of day of the week information.
dayofweek, the default, instructs PMDF to retain any day
of the week information and to add this information to date/time
headers if it is missing.
nodayofweek instructs PMDF to remove any leading day of
the week information from date/time headers. This is intended to
provide compatibility with incompliant mail systems that cannot process
this information properly; it should never be used for any other