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Emails cause errors and block traffic

We have a Windows 2012 web server which has recently been having a few problems with sending the odd SMTP email (generated by an ASP web application). I don't know much about this but I've been tasked with trying to sort it. When either of the errors below occur, the email in question sits on the server in the SMTP queue folder. The only solution until now has been to remote in to the server and manually delete the offending email.  In the Event log we see the following -

PROBLEM 1
Message delivery to the host '<destination IP' failed while delivering to the remote domain 'customer.co.uk' for the following reason: An SMTP protocol error occurred.
The SMTP verb which caused the error is 'HELO'.  The response from the remote server is '501 Syntax error in parameters or arguments
D70204C0

PROBLEM 2
Message delivery to the host 'Our external IP' failed while delivering to the remote domain 'ourcompanyname.com' for the following reason: The connection was dropped by the remote host.
D30204C0

Can anyone offer assistance?

Many thanks.
0
funasset
Asked:
funasset
1 Solution
 
Eric_Where_am_ICommented:
Problem 2 looks like a product of Problem 1.  I think if you address 1 then 2 will go away.

Sounds like exactly what it says, a syntax error in the code that SMTP reads to process the request.

Are these processes a function of a form that you fill out so that a server can send mail?

if so check the settings in the form...

or is this a script that you can edit.

if so...it is likely that something specific has changed and needs to be updated in the script.

if it is script then an expert will want to see the script...I am not that guy.
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funassetAuthor Commented:
Many thanks.

I gave this to our guy who handles this side of the business and it helped to point him towards a better method of handling such emails.  I'm afraid I can't say what it is as frankly I don't understand!

Cheers for your useful pointer though.
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