From Bugzilla Helper: User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8b) Gecko/20050201 Firefox/1.0+ (PowerBook) Description of problem: There's a bug in 8.12.11 that was fixed upstream in 8.13.2. The release notes describe it best: If a server returns a 421 reply to the RSET command between message deliveries, do not attempt to deliver any more messages on that connection. This prevents bogus "Bad file number" recipient status. Problem noted by Allan E Johannesen of Worcester Polytechnic Institute. (http://www.sendmail.org/ftp/RELEASE_NOTES) Version-Release number of selected component (if applicable): 8.12.11 How reproducible: Always Steps to Reproduce: 1. Try to send 2 mails to an address @aol.com from a host with no reverse DNS 2. Observe the first one rejected properly with a 421, the second with a "Deferred: Bad file descriptor" status. 3. Actual Results: See above Expected Results: the second mail should have a "Deferred: 421..." status instead Additional info: It's fixed upstream, please just incorporate their fix.
I am sorry, but the fix is very large, because it has to get fixed in several parts of sendmail. Even 8.14.0 still contains fixes for 421 returns. Closing as WONTFIX.