I do a fresh install on another machine to see what's wrong.
It behaves the same as the old one.
All services working fine, I can send and receive mail, IMAP working fine
too .Just POP3 needed really long time to connect.
No matter I use IP or FQDN,
# telnet (mail.domain.com or IP) 110
Escape character is '^]'. *** I have to wait more than 30 seconds then the
next line shows up.
+OK <27180.1125080475@ mail.domain.com >
User [EMAIL PROTECTED]
+OK
Pass password
+OK
List
+OK
1 1406
2 829
*** SMTP and IMAP are working fine. I get the response right away if I
telnet:
# telnet (mail.domain.com or IP) 143 or
# telnet (mail.domain.com or IP) 25
Can we do something to improve this?
*** I didn't follow exactly EZ-QmailToaster-Install.txt on your site, I skip
'FTP server' and 'DNS server', is it matter?
Thanks in advance,
Philip
-----Original Message-----
From: Joseph Lundgren [mailto:[EMAIL PROTECTED]
Sent: Friday, August 26, 2005 2:29 PM
To: [email protected]
Cc: [EMAIL PROTECTED]
Subject: RE: [qmailtoaster] POP3 connection slow
Phillip,
Are you saying that connecting to the POP3 server takes 30 seconds
before you receive the server's greeting message?
>From a DOS or *nix shell terminal, try a manual POP3 session to find out
where the slowness occurs.
# telnet mail.yourhost.com 110
Trying xxx.xxx.xxx.xxx...
Connected to mail.yourhost.com (xxx.xxx.xxx.xxx).
Escape character is '^]'.
+OK <27180.1125080475@ mail.yourhost.com >
quit
+OK
Connection closed by foreign host.
If the slowness happens after "Trying xxx.xxx.xxx.xxx..." and before
"Connected to mail.yourhost.com" check the DNS servers that you have
configured to resolve IP Addresses for your toaster (look in
/etc/resolv.conf) to ensure that they respond in a timely manner. I
believe that every POP3, IMAP, or SMTP connection to the server
initiates a reverse-lookup of the IP address making the connection. I
would recommend that you ssh into the server and start doing 'dig' and
'nslookup' requests to different hosts around the internet to gauge how
fast the server responds to both forward and reverse lookup requests.
If you will only be connecting to your server from a limited amount of
hosts (say, from a corporate gateway, or similar), you may want to
consider populating your /etc/hosts file with the values most commonly
encountered.
In my experience with qmailtoaster, slow responses from DNS servers
cause Very Bad problems, increasingly so as the load on your toaster
increases.
If the 30-second delay is occurring elsewhere in the POP3 transaction, I
dunno what may be happening.
--
Joseph Lundgren
Systems Administrator
Peak Internet, LLC
[EMAIL PROTECTED]
-----Original Message-----
From: Philip Moy [mailto:[EMAIL PROTECTED]
Sent: Friday, August 26, 2005 10:56 AM
To: [email protected]
Subject: [qmailtoaster] POP3 connection slow
Hi,
When I connected to pop3, I need to wait about 30 seconds then get the
mail.
I wonder is there a way to solve this? WEB access and IMAPS working
fine.
Thanks,
Philip
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