a DNS lookup at startup and could not proceed.
.IP 12
BSMTP batch file could not be opened.
+.IP 13
+Poll terminated by a fetch limit (see the --fetchlimit option).
.IP 23
Internal error. You should see a message on standard error with
details.
RFC 937
.TP 5
POP3:
-RFC 1081, RFC 1225, RFC 1460, RFC 1725, RFC 1939
+RFC 1081, RFC 1225, RFC 1460, RFC 1725, RFC 1939, RFC 2449
.TP 5
APOP:
RFC 1460, RFC 1725, RFC 1939
RFC 1176, RFC 1732
.TP 5
IMAP4:
-RFC 1730, RFC 1731, RFC 1732, RFC 2060, RFC 2061
+RFC 1730, RFC 1731, RFC 1732, RFC 2060, RFC 2061, RFC 2195
.TP 5
ETRN:
RFC 1985