Noticing a problem in Courier (0.40). This was a working installation,
that all of a sudden started showing these symptoms.
Some mail clients take a long time to make the ehlo command.
If I telnet to the server, it takes over a minute for the 220 to appear.
ehlo localhost
response > 60 seconds later
220 ss-crazy.webisaur.com ESMTP
250-ss-crazy.webisaur.com Ok.
250-AUTH LOGIN
250-AUTH=LOGIN X-NETSCAPE-HAS-BUGS
250-STARTTLS
250-XVERP=Courier
250-XEXDATA
250-XSECURITY=NONE,STARTTLS
250-PIPELINING
250-8BITMIME
250-SIZE
250 DSN
SquirrelMail was having the same delay problem, so we switched it to
sendmail, which functions just fine.
At first I thought it was a bad DNS Blacklist in BOFH, but incoming SMTP
mail comes in very fast...also, I tried running it w/out any blacklists
installed (editing BOFH and esmtpd) and that didn't fix it.
Microsoft Outlook Express 5.5, as luck would have it, does NOT experience
this delay when sending directly to Courier SMTP. It sends mail immediately
when connected.
Microsoft Outlook 98, on the other hand, DOES have this > 60 second delay
Netscape Messenger 4.7 doesn't have this delay.
So, to recap: telnet, SquirrelMail (using SMTP) and Microsoft Outlook show
this delay.
Regular server-relayed mail, Microsoft Outlook Express, and Netscape
Communicator 4.7 do not have this delay.
my config files, if that helps:
contents of /etc/courier/esmtpd
-------------------------------
PATH=/usr/lib/courier/bin:/bin:/usr/bin:/usr/local/bin
SHELL=/bin/sh
ULIMIT=4096
BOFHCHECKDNS="1"
BOFHNOEXPN=0
BOFHNOVRFY=0
NOADDMSGID="0"
NOADDDATE="0"
AUTH_REQUIRED="0"
COURIERTLS=/usr/lib/courier/bin/couriertls
TLS_PROTOCOL=SSL3
TLS_CERTFILE=/usr/lib/courier/share/esmtpd.pem
TLS_VERIFYPEER=NONE
MAILUSER=courier
MAILGROUP=courier
PORT=smtp
ACCESSFILE=${sysconfdir}/smtpaccess
MAXDAEMONS="80"
MAXPERC="10"
MAXPERIP="10"
PIDFILE=/var/spool/courier/tmp/esmtpd.pid
TCPDOPTS="-stderrlogger=/usr/lib/courier/sbin/courierlogger -noidentlookup"
AUTHMODULES="authdaemon"
ESMTPAUTH="LOGIN"
AUTHMODULES_WEBADMIN="authdaemon"
ESMTPAUTH_WEBADMIN="LOGIN CRAM-MD5"
ESMTPAUTH_TLS="PLAIN LOGIN"
ESMTPAUTH_TLS_WEBADMIN="PLAIN LOGIN CRAM-MD5"
ESMTPDSTART="YES"
contents of /etc/courier/courierd
------------------------------
prefix="/usr/lib/courier"
exec_prefix="/usr/lib/courier"
PATH=/usr/lib/courier/bin:/bin:/usr/bin:/usr/local/bin
SHELL=/bin/sh
DYNAMICDELIVERIES=1
DEFAULTDELIVERY=./Maildir
MAILDROPDEFAULT=./Maildir
ESMTP_CORK=1
UUXFLAGS="-j -g C"
ESMTP_USE_STARTTLS=1
LC_ALL=C
COURIERTLS=/usr/lib/courier/bin/couriertls
ESMTP_TLS_VERIFY_DOMAIN=0
TLS_PROTOCOL=SSL3
TLS_TRUSTCERTS=/usr/lib/courier/share/rootcerts
TLS_VERIFYPEER=NONE
------------------------------
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