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troubleshooting Question

External Company cannot send E-mails to our users using one of their applications they use to distribute, and send E-mails.

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Newguy 123 asked on
ExchangeEmail ServersActive Directory
8 Comments1 Solution96 ViewsLast Modified:
Hello Experts. We have Exchange 2010 Standard in our Environment. one of companies cannot send us E-mails using the application they use to distribute E-mails to groups. Users individually from that company can send us E-mails no problem, but when they do it through their application, it does not come through to us, does not show anywhere on or E-mail gateway, and they receive the attached bounce back. Please assist in troubleshooting and resolving this issue. Thanks in advance.
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