Email FROM One Recipient not being delivered to us

[brainey]

I use Microsoft Exchange Server 2000 along with Small Business Server 2000
(which includes ISA Server 2000). I am hosting my email for my domain
through Exchange Server. We have a customer whose email never shows up in
our organization. Actually, he can send from two different email addresses
with different domains and neither show up. He can successfully send to my
Gmail account, but we never receive his emails at our domain. I have checked
my antivirus program and it is not blocking it as spam. I have even
whitelisted the email addresses in our antivirus program (Server version of
TrendMicro), but to no avail. I have checked for his email within Exchange
Server, but cannot find anything.

I presume that this particular email is being blocked somewhere in my Small
Business Server, but I cannot find any settings that would be blocking it.
Do you have any suggestions of where to look? Can I whitelist this email
address somewhere in Exchange Server 2000?

[SteveB]

Check the message tracking log to see if it shows anything related to these
messages being received.

Post by brainey
I use Microsoft Exchange Server 2000 along with Small Business Server 2000
(which includes ISA Server 2000). I am hosting my email for my domain
through Exchange Server. We have a customer whose email never shows up in
our organization. Actually, he can send from two different email addresses
with different domains and neither show up. He can successfully send to my
Gmail account, but we never receive his emails at our domain. I have checked
my antivirus program and it is not blocking it as spam. I have even
whitelisted the email addresses in our antivirus program (Server version of
TrendMicro), but to no avail. I have checked for his email within Exchange
Server, but cannot find anything.
I presume that this particular email is being blocked somewhere in my Small
Business Server, but I cannot find any settings that would be blocking it.
Do you have any suggestions of where to look? Can I whitelist this email
address somewhere in Exchange Server 2000?

[brainey]

I have already done that and there is no sign of the email address. I should
have mentioned that I had done this. I have an AT&T router for internet
access, but I have never done any programming on this, so I doubt it would be
the problem.

Do you have any suggestions of where to look next?

Post by SteveB
Check the message tracking log to see if it shows anything related to these
messages being received.

Post by brainey
I use Microsoft Exchange Server 2000 along with Small Business Server 2000
(which includes ISA Server 2000). I am hosting my email for my domain
through Exchange Server. We have a customer whose email never shows up in
our organization. Actually, he can send from two different email addresses
with different domains and neither show up. He can successfully send to my
Gmail account, but we never receive his emails at our domain. I have checked
my antivirus program and it is not blocking it as spam. I have even
whitelisted the email addresses in our antivirus program (Server version of
TrendMicro), but to no avail. I have checked for his email within Exchange
Server, but cannot find anything.
I presume that this particular email is being blocked somewhere in my Small
Business Server, but I cannot find any settings that would be blocking it.
Do you have any suggestions of where to look? Can I whitelist this email
address somewhere in Exchange Server 2000?

[SteveB]

Sorry can't help much more. I upgraded all my clients to SBS 2003/Exchange
2003 long ago and now don't remember much about SBS 2000/Exchange 2000.

Post by brainey
I have already done that and there is no sign of the email address. I should
have mentioned that I had done this. I have an AT&T router for internet
access, but I have never done any programming on this, so I doubt it would be
the problem.
Do you have any suggestions of where to look next?

Post by SteveB
Check the message tracking log to see if it shows anything related to these
messages being received.

Post by brainey
I use Microsoft Exchange Server 2000 along with Small Business Server 2000
(which includes ISA Server 2000). I am hosting my email for my domain
through Exchange Server. We have a customer whose email never shows up in
our organization. Actually, he can send from two different email addresses
with different domains and neither show up. He can successfully send
to
my
Gmail account, but we never receive his emails at our domain. I have checked
my antivirus program and it is not blocking it as spam. I have even
whitelisted the email addresses in our antivirus program (Server
version
of
TrendMicro), but to no avail. I have checked for his email within Exchange
Server, but cannot find anything.
I presume that this particular email is being blocked somewhere in my Small
Business Server, but I cannot find any settings that would be blocking it.
Do you have any suggestions of where to look? Can I whitelist this email
address somewhere in Exchange Server 2000?

[Merv Porter [SBS-MVP]]

Do you have a PRT record set up for your mail server. I'm thinking that
email sent from his domain may be blocked to your domain because the sending
mail server cannot verify that you're IP address is really you, so it
deletes the mail. Would also be good to check whether your IP address or
domain has been blacklisted.

Basic DNS: PTR records and why you care
http://aplawrence.com/Blog/B961.html

Check Blacklists
http://www.mxtoolbox.com/blacklists.aspx
--
Merv Porter [SBS-MVP]
============================

Post by brainey
I have already done that and there is no sign of the email address. I should
have mentioned that I had done this. I have an AT&T router for internet
access, but I have never done any programming on this, so I doubt it would be
the problem.
Do you have any suggestions of where to look next?

Post by SteveB
Check the message tracking log to see if it shows anything related to these
messages being received.

Post by brainey
I use Microsoft Exchange Server 2000 along with Small Business Server 2000
(which includes ISA Server 2000). I am hosting my email for my domain
through Exchange Server. We have a customer whose email never shows up in
our organization. Actually, he can send from two different email addresses
with different domains and neither show up. He can successfully send
to
my
Gmail account, but we never receive his emails at our domain. I have checked
my antivirus program and it is not blocking it as spam. I have even
whitelisted the email addresses in our antivirus program (Server
version
of
TrendMicro), but to no avail. I have checked for his email within Exchange
Server, but cannot find anything.
I presume that this particular email is being blocked somewhere in my Small
Business Server, but I cannot find any settings that would be blocking it.
Do you have any suggestions of where to look? Can I whitelist this email
address somewhere in Exchange Server 2000?

[brainey]

I have turned SMTP logging on and had the customer resend the emails and they
still do not show up in these logs.

Since the email does not appear to be even getting to my Exchange Server,
then I will assume that the problem is leaving the senders losting servers
which is Windstream. I have gotten permission from the email sender to call
Windstream on their behalf and see if they can determine if their servers are
deleting the emails to our domain.

Post by Merv Porter [SBS-MVP]
Do you have a PRT record set up for your mail server. I'm thinking that
email sent from his domain may be blocked to your domain because the sending
mail server cannot verify that you're IP address is really you, so it
deletes the mail. Would also be good to check whether your IP address or
domain has been blacklisted.
Basic DNS: PTR records and why you care
http://aplawrence.com/Blog/B961.html
Check Blacklists
http://www.mxtoolbox.com/blacklists.aspx
--
Merv Porter [SBS-MVP]
============================

Post by brainey
I have already done that and there is no sign of the email address. I should
have mentioned that I had done this. I have an AT&T router for internet
access, but I have never done any programming on this, so I doubt it would be
the problem.
Do you have any suggestions of where to look next?

Post by SteveB
Check the message tracking log to see if it shows anything related to these
messages being received.

Post by brainey
I use Microsoft Exchange Server 2000 along with Small Business Server 2000
(which includes ISA Server 2000). I am hosting my email for my domain
through Exchange Server. We have a customer whose email never shows up in
our organization. Actually, he can send from two different email addresses
with different domains and neither show up. He can successfully send
to
my
Gmail account, but we never receive his emails at our domain. I have checked
my antivirus program and it is not blocking it as spam. I have even
whitelisted the email addresses in our antivirus program (Server
version
of
TrendMicro), but to no avail. I have checked for his email within Exchange
Server, but cannot find anything.
I presume that this particular email is being blocked somewhere in my Small
Business Server, but I cannot find any settings that would be blocking it.
Do you have any suggestions of where to look? Can I whitelist this email
address somewhere in Exchange Server 2000?