MIMEDefang 3.5-rc1

• improve how filter elapsed time is calculated
• remove socket file on exit
• add an option to disable DKIM header lines wrap
• simplify newline and return/newline handling in DKIM signatures
• add action_greylist to support basic greylisting
• remove CR from multiline header's values
• add a sub to send a multipart mail message using Sendmail
• add a sub to check emails using Mail::SpamAssassin::Client
• add re_match_in_tgz_directory sub to block attachments in .tgz files
• add a Mail::MIMEDefang::SPF module to do Sender Policy Framework checks