We help IT Professionals succeed at work.
Get Started

5.3.3 smtp;500 5.3.3 Unrecognized command>

2,361 Views
Last Modified: 2013-11-30

we have exchnage2003 and 2007 for three years and never had the issue.
this is what happened lastnight

user from exchnage2003 sent an email to user on exchnage2007 and got the following error.
A critical function required for the transfer or delivery of the message was not supported by the originator of the report

5.3.3 smtp;500 5.3.3 Unrecognized command>

user from exchnage2007 to 2007 was able to send each others.
i looked the event viewer and services and found nothing to show any error.
i had to reboot the exchnage2007 and was able to send mail each others.
Any idea?
Comment
Watch Question
Commented:
This problem has been solved!
Unlock 1 Answer and 2 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE