Greetings Since two weeks ago, I have been seeing the following error message on the logs: 29 Apr 2009 16:27:53 Mail posted via SMTP to [log in to unmask] . 29 Apr 2009 16:27:53 Enqueued for background delivery, ID=4CED1982 29 Apr 2009 16:27:53 Done - 1 outbound file (28 rcpts). 29 Apr 2009 16:27:53 Message DISTRIBUTEd to 28 recipients. 29 Apr 2009 16:27:53 Sent information mail to [log in to unmask] 29 Apr 2009 16:27:53 Starting background delivery for 237D965B (0/16) 29 Apr 2009 16:27:53 >>> Error X'0000003B' during background delivery, ID=237D965B <<< 29 Apr 2009 16:27:53 -> Severity: Error 29 Apr 2009 16:27:53 -> Facility: Generic error codes 29 Apr 2009 16:27:53 -> Abstract: Invalid input file/data format Also, no messages to large groups are leaving from the listserv . Listserv delivers the confirmation message that the message was distributed (on a list with a confirmation configured), but the distributed message does not go out to all 28 recipients. What is the reason for the Error displayed? Miguel A. Almanza web & unix administrator | [log in to unmask] | 713-221-8557