Hello all, 

Been getting a lot of calls about MUA's reporting "Unable to locate
mail.f-tech.net" usually from Eudora lite or Netscape Communicator.  I'm
not sure if this is a tcp problem or tcpserver problem.

Here's what happens..

Customer clicks on either send mail or check mail, a window pops up and
states that it cannot find the network address of mail.f-tech.net.  It
happened to me once, but if you wait, then try again it goes through.

My mail server is qmail 1.03 on a Cyrix 200MMx 32 Mb ram 2Gb root
partition with /home mounted on a seperate 6Gb disk. 

Here is a snapshot of netstat -a right after a customer called.. dosen;t
seem to be a heavy load..

tcp        0    130 mail.f-tech.net:telnet  admin.f-tech.net:1024
ESTABLISHED
tcp        0      0 mail.f-tech.net:pop     ft171.f-tech.net:4182
ESTABLISHED
tcp        0      0 mail.f-tech.net:smtp    ft220.f-tech.net:1062
ESTABLISHED
tcp        1      0 mail.f-tech.net:pop     ft187.f-tech.net:1072
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     ft159.f-tech.net:2423
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     ft192.f-tech.net:1040
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     ft111.f-tech.net:1031
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     pm4-198.pot.infi.n:1221
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     ft135.f-tech.net:1091
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     ft147.f-tech.net:3196
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     ft147.f-tech.net:3197
TIME_WAIT
tcp        1      0 mail.f-tech.net:pop     ft111.f-tech.net:1035
TIME_WAIT
tcp        0      0 mail.f-tech.net:pop     ft220.f-tech.net:1065
ESTABLISHED
tcp        0      0 mail.f-tech.net:smtp    www.zone.com:2550
ESTABLISHED
tcp        0      2 mail.f-tech.net:1362    www.zone.com:auth
SYN_SENT
ud

at most I can have 72 people using pop (that's all the modems I have) and
qmail-pop3 is run from tcpserver:

29384  ?  S    0:00 supervise /var/lock/qmail-pop3d tcpserver -c40 -u0 -g0
0 pop-3 qmail-popup mail.f-tech.net checkpassword qmail-pop3d Maildir
29385  ?  S    1:14 tcpserver -c40 -u0 -g0 0 pop-3 qmail-popup
mail.f-tech.net checkpassword qmail-pop3d Maildir
2

Any advice on where to look first?

My network is split 10/100 using a D-Link 10/100 switching Hub.  Modems
are on the 10, mail server is on the 100.

The NIC is a d-link 530-TX PCI controller and seems to be running clean:

eth0      Link encap:Ethernet  HWaddr 00:80:C8:48:4C:C0
          inet addr:207.44.65.16  Bcast:207.44.65.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6434950 errors:0 dropped:0 overruns:0
          TX packets:6149503 errors:0 dropped:0 overruns:0
          Interrupt:11 Base address:0x6000
 
Anything look wrong??

Paul D. Farber II
Farber Technology
717-628-5303
[EMAIL PROTECTED]

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