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Check your SMTP log file to fine out what the specific reason for the reset it.<br />
<br />
Also, if this only happens on a couple of domains, its possible these domains, though different, are using the same email server to accept and process messages. Which means it might just be a problem with the remote mail server.
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Check your SMTP log file to fine out what the specific reason for the reset it.

Also, if this only happens on a couple of domains, its possible these domains, though different, are using the same email server to accept and process messages. Which means it might just be a problem with the remote mail server.

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Hello Mavant,<br />
<br />
HELO ? And EHLO ?<br />
<br />
Regards.
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Hello Mavant,

HELO ? And EHLO ?

Regards.

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We are having an issue that just recently started in which the SMTP connection is being dropped or reset folowing Helo. This is only occuring with a couple of domains that I know of. I have verified we are not on any blacklists and I am trying to contact the admins for the domains to find out if they know why we are being reset. I am looking for any information on what would cause a reset after Helo. I should note that we are using a Barracuda appliance as our smtp gateway, but it has been working without issue for several months.<br />
<br />
Thank You for your assistance
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We are having an issue that just recently started in which the SMTP connection is being dropped or reset folowing Helo. This is only occuring with a couple of domains that I know of. I have verified we are not on any blacklists and I am trying to contact the admins for the domains to find out if they know why we are being reset. I am looking for any information on what would cause a reset after Helo. I should note that we are using a Barracuda appliance as our smtp gateway, but it has been working without issue for several months.

Thank You for your assistance

experiancing smtp connection reset during Helo to multiple Domains

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.