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Timeout from SMTP on HP-UX

I am using the SMTP on HP-UX 10.10 as my email gateway for sending out emails. Currently, there are 20 clients using outlook express on win95 for emailing. There is also a router with 64Kbps link for WAN connection. Recently, I have experience timeout message from SMTP and the email cannot be sent out. I have set the timeout interval on the
Outlook express from 1 min to 2 mins. But the same message still occur. Please advise me on how to troubleshoot this problem?
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blowfish
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Megahertz

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Hello Blowfish,

Thank you for your rely.
I could not find the Timeout.queuereturn= in my sendmail.cf file.
I could only find the #return time
 The version of UNIX I am running is HP-UX 10.10.
cont'd
it is under the <Localizable Options> as follow:
#return time
0r5m

Is this the same as Timeout.queuereturn= option that you have mentioned.

TIA
Most of my experience with Sendmail is with the Solaris version by Sun, and with the Berkely version 8.x.  The only HP-UX systems I have access to identify themselves as "HP-UX B.10.20".  The sendmail running there is (berkely) "Version 8.7.5".  

To determine your sendmail version, type the following at the command prompt (you do not need to be root for this);  

  #  /usr/lib/sendmail -d0.9 < /dev/null

I am not familiar with the lines that you have posted in your previous comment.  If you wish, you can send me a copy of your sendmail.cf via e-mail, and I'll see if I can provide any further suggestions.  You'll find my e-mail address under my profile.  

--frankf
In your original question you state that you are experiencing timeout messages from SMTP.  Where are you getting these timeout messages, and what do they look like?  


Hello Blowfish,

I will do the testing this weekend and let you know the outcome.
And also not to forget to you the credit.

Cheers,
MegaHertz
Hello Blowfish,

So far it works fine.
:>

Thanks,
megahertz