Thanks! Now, I am the admin of 'mta.domain.edu' so I'm trying to see what's generating the 5.0.0 on that side... Note that I never intended to wear a sendmail hat... :) Looking at the other end, I'm seeing the following: Too many recipients But this is generating dsn=4.5.3, stat=Deferred After several of these, I then get Possible SMTP RCPT flood, throttling. Could this be causing it? Ricardo. On Wed, Oct 1, 2014 at 12:58 PM, Valdis Kletnieks <[log in to unmask]> wrote: > On Wed, 01 Oct 2014 12:27:06 -0400, Ricardo Stella said: > > Sep 30 14:42:05 listserv sendmail[10584]: s8UCVDur023009: > > to=<[log in to unmask]>, delay=00:00:00, xdelay=00:00:00, > > mailer=esmtp,pri=231994, relay=mta.domain.edu. [10.0.0.10], dsn=5.0.0, > > stat=Service unavailable > > dsn=5.0.0. Ding ding ding, we have a *winner*! > > Tell the admin of mta.domain.edu to not return a 5.0.0 error code in > this case. Return codes starting with 5 are by definition permanent > errors, and the mail should *not* be queued for retry. 4.x.x errors > are temporary and will cause a requeue. This is how things have worked > since RFC821 all the way back in 1982. > > This one has a different cause: > > Sep 30 14:42:05 listserv sendmail[10584]: s8UIg5bl010584: > to=<owner-mylist-l*user1**DOMAIN*[log in to unmask]>, delay=00:00:00, > xdelay=00:00:00, mailer=esmtp, pri=30000, relay=mta.domain.edu., > dsn=5.7.0, > stat=User unknown > > You need a patch against Sendmail so it knows to pass all owner-* mail to > Listserv. I've attached it. If your copy of lsv_amin lives somewhere > other > than /usr/local/bin, you'll need to adjust it accordingly. > > > ############################ > > To unsubscribe from the LSTSRV-L list: > write to: mailto:[log in to unmask] > or click the following link: > http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1 > -- °(((=((===°°°(((================================================ ############################ To unsubscribe from the LSTSRV-L list: write to: mailto:[log in to unmask] or click the following link: http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1