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One domain having trouble sending email to our mailbox.

Hello Experts,

I have a wierd problem that I'm hoping you can help me with.  I have a client here in Canada whos POP mail account is on one of our servers.  I got a call from them the other day saying that they have a person in peru who is trying to send them emails and is unable to do so.  When I contacted this person, they gave me this as the error message:

eTrust Secure Content Manager SMTPMAIL could not deliver the e-mail below
because of unreachable host
Please check the recipients e-mail address before you try again:

Now I know that the host is alive and running, also it only seems to be one domain (or one smtp server) in peru that is having the problem.  Anybody have any ideas on even where to start.

Thanks
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seanostephens
Asked:
seanostephens
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1 Solution
 
ahoffmannCommented:
> .. have any ideas on even where to start.
check the logfiles of the server which produced the error message
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seanostephensAuthor Commented:
Hi ahoffmann,

I've checked the maillogs on my server and I dont even see the occurance of the email address that is having problems.  Plus I dont have access to the SMTP server that is trying to send to us.  Should I put the ball back into their court and ask them to check their logs?
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wnrossCommented:
Considering the distance involved, I would check how quick your DNS responds, this could simply be time delays

Do a DNS timing test on http://www.dnsstuff.com/, that should give you an idea

CHeers,
-Bill
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ahoffmannCommented:
> Should I put the ball back into their court and ask them to check their logs?
yes
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seanostephensAuthor Commented:
Hi Bill,

I did a DNS timing check on the domain they are trying to send to and I am getting a C+ average or approx 160ms.  So thats ok right?
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seanostephensAuthor Commented:
Update:  I just was notified by MY client that they are able to recieve emails from the same person using another address.  So I have asked the SMTP server provider to look at his logs and we'll go from there.  Thanks for all your input guys.
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wnrossCommented:
160ms is decent enough.   Cheers,
-Bill
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