I'm trying to setup sendmail/dovecot on a new server running CentOS-6 (well, CentOS-6.2 now). Everything seems to go well, but when I run fetchmail I get this warning: ------------------------------------ [tim at grover ~]$ fetchmail imap.maths.tcd.ie fetchmail: Warning: the connection is insecure, continuing anyways. (Better use --sslcertck!) ------------------------------------ I should say that everything runs fine on a CentOS-5.7 server, and as far as I can see the setup on the new server is the same. Under CentOS-5.7 I don't get the same warning: ------------------------------------ [tim at helen ~]$ fetchmail imap.maths.tcd.ie fetchmail: No mail for tim at imap.maths.tcd.ie ------------------------------------ If I do add --sslcertck (as suggested) I get the response: ------------------------------------ [tim at grover ~]$ fetchmail --sslcertck imap.maths.tcd.ie fetchmail: Server certificate verification error: self signed certificate fetchmail: This means that the root signing certificate (issued for /C=IE/ST=Dublin/L=Dublin/O=School of Mathematics, Trinity College, Dublin./OU=Automatically-generated IMAP SSL key/CN=imap.maths.tcd.ie/emailAddress=postmaster at maths.tcd.ie) is not in the trusted CA certificate locations, or that c_rehash needs to be run on the certificate directory. For details, please see the documentation of -- sslcertpath and --sslcertfile in the manual page. 139925738739528:error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed:s3_clnt.c:1063: fetchmail: SSL connection failed. fetchmail: socket error while fetching from tim at imap.maths.tcd.ie fetchmail: Query status=2 (SOCKET) ------------------------------------ That is on the new server. On the old server (where the fetchmail command works) I get much the same warning, though briefer. ------------------------------------ [tim at helen ~]$ fetchmail --sslcertck imap.maths.tcd.ie fetchmail: Server certificate verification error: self signed certificate 11316:error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed:s3_clnt.c:915: fetchmail: SSL connection failed. fetchmail: socket error while fetching from tim at imap.maths.tcd.ie fetchmail: Query status=2 (SOCKET) ------------------------------------ I must admit I've never been very clear on SSL authentication -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin