We seem to be having an odd pop3 issue with Cyrus under FreeBSD. We have
installed:
cyrus-imapd-2.0.16_1 The cyrus mail server, supporting POP3 and IMAP4 protocols
cyrus-sasl-1.5.24_7 RFC 2222 SASL (Simple Authentication and Security Layer)
cyrus-sasl-1.5.24_8 RFC 2222 SASL (Simple Authentication and Security Layer)
cyrus-sasl-1.5.27_2 RFC 2222 SASL (Simple Authentication and Security Layer)
Basically, what happens is that every so often a pop3 connection fails. It
seems like a connection is made, but then that's it:
$ telnet mail.example.com 110
Trying aa.bb.cc.dd..
Connected to mail.example.com
Escape character is '^]'.
This will just sit there for a while until I ^c. This occurs locally as well:
$ telnet localhost 110
Trying 127.0.0.1..
Connected to mail.example.com
Escape character is '^]'.
We have tcp_wrappers logging connections:
pop3: ALL :\
spawn (/usr/bin/logger "accepted pop3 connect from %c (%a)") &
But nothing shows up in the logfile during this connection. (On regular,
working connections, we will get a log entry.) At first, I thought it might
be some odd DNS issue if Cyrus was trying to reverse map the client or
something, but the localhost test seems to disprove that theory. (But I
could be wrong.)
It appears that if I restart Cyrus the problem will clear up, although not
always after just a single restart. It may take a few restarts or a few
minutes; I haven't figured out the relationship yet.
Any ideas or troubleshooting that I can do? BTW, I am seeing this in our logs:
Apr 28 19:14:50 mars pop3d[13870]: accept failed: Software caused
connection abort
However, this log entry was NOT created when I performed the testing above
with telnet.
Regards, Dustin
cyrus.conf:
# cat cyrus.conf
# standard standalone server implementation
START {
# do not delete these entries!
mboxlist cmd="ctl_mboxlist -r"
deliver cmd="ctl_deliver -r"
# this is only necessary if using idled for IMAP IDLE
# idled cmd="idled"
}
# UNIX sockets start with a slash and are put into /var/imap/socket
SERVICES {
# add or remove based on preferences
imap cmd="imapd" listen="imap" prefork=0
# imaps cmd="imapd -s" listen="imaps" prefork=0
pop3 cmd="pop3d" listen="pop3" prefork=0
# pop3s cmd="pop3d -s" listen="pop3s" prefork=0
# sieve cmd="timsieved" listen="sieve" prefork=0
# at least one LMTP is required for delivery
# lmtp cmd="lmtpd" listen="lmtp" prefork=0
lmtpunix cmd="lmtpd" listen="/var/imap/socket/lmtp" prefork=0
}
EVENTS {
# this is required
checkpoint cmd="ctl_mboxlist -c" period=30
# this is only necessary if using duplicate delivery suppression
delprune cmd="ctl_deliver -E 3" period=1440
}
---
Dustin Puryear <[EMAIL PROTECTED]>
UNIX and Network Consultant
http://members.telocity.com/~dpuryear
PGP Key available at http://www.us.pgp.net
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