I wonder if SEND=EDITOR,HOLD has anything to do with it?

 POSTCARD - Those Interested in Collecting and Exchanging Postcards

 Review= Postmaster,Owner
 Subscription=Open,Confirm
 Send=Editor, hold
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 Reply-to= Sender,Respect
 Files=No
 Validate=no
 X-Tags=Yes
 NOTEBOOK=YES,A,WEEKLY,Private
 Confidential=No
 Ack=No
 Stats=Normal,OWNER
 Default-Options= Repro
 RENEWAL= 6-MONTHLY,DELAY(21)