I fetchmail on my CentOS-6.2 from 4 servers. One always gives the warning ----------------------------- [tim at grover cron.d]$ fetchmail -a go.tcd.ie fetchmail: Error exchanging credentials 6 messages for tmurphy at go.tcd.ie. reading message tmurphy at go.tcd.ie:1 of 6 (2978 header octets) (2639 body octets) flushed ... ----------------------------- The messages seem to come over OK, so it seems the warning doesn't matter. Or does it? I don't get the warning from other IMAP servers. But I was wondering if my setup in /etc/pki/tls/certs/ is correct. I have 3 .crt files: ca-bundle.crt from CentOS installation (actually from ca-certificates*.rpm), gayleard.crt , the certificate I got from CAcert.org cacert.crt , the Class 3 root certificate from CAcert.org . I'm wondering if I am supposed to append the cacert.crt to ca-bundle.crt , and if failure to do that could be the cause of the warning? Alternatively, should I use the Class 1 root certificate from CAcert? (I didn't because CAcert said this was for Windows.) Finally, can anyone kindly point me to an online article that would answer the queries above? -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin