troubleshooting Question

unable to receive email from certain people

Avatar of npanprome
npanprome asked on
ExchangeLotus IBM
9 Comments1 Solution1316 ViewsLast Modified:
Dear Experts,

We are using Microsoft Exchange Server 2003 SP2, for the passed 2 weeks
we got a call from our customer said they are unable to send email to us
but we can send email to them

they receive the bounce back email said

Router: Failed to connect to SMTP host UNICAL.COM because : SMTP Protocol Returned a Permanent Error

today I got a notice from another user saying the same error, they both using Lotus Note as thier email server

Please advice,

Thank you
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