When I send email with -------------------------- [tim@carrie ~]$ mail -s "Test 2" gayleard@xxxxxxxxxx Testing ... Cc: -------------------------- I get the above error message in /var/log/maillog . More fully, I get -------------------------- Sep 20 14:42:22 carrie sendmail[17175]: m8KCgMOa017173: to=<gayleard@xxxxxxxxxx>,<tim@xxxxxxxxxxxx>, ctladdr=<tim@xxxxxxxxxxxxxxxxxxx> (500/500), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=150351, relay=smtp.eircom.net [159.134.198.135], dsn=5.6.0, stat=Data format error Sep 20 14:42:22 carrie sendmail[17175]: m8KCgMOa017173: m8KCgMOa017175: DSN: Data format error Sep 20 14:42:22 carrie sendmail[17175]: m8KCgMOa017175: to=gayleard@xxxxxxxxxx, delay=00:00:00,xdelay=00:00:00, mailer=relay, pri=31582, relay=smtp.eircom.net, dsn=2.0.0, stat=Sent (ok 1221918274 qp 15906) -------------------------- What exactly is DSN? As far as I can see from google, it stands for "Data Source Name". But what does "dsn=2.0.0" mean? As far as I can see, this error only arose recently. I'm running Fedora-9 with kernel 2.6.26.3-29 and sendmail-8.14.2-4 . I should say, this only occurs when I send mail as above with the "mail" command. If I send it from within KMail, as normal, it is sent OK. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines