Event ID - 7004

Event Id7004
DescriptionThis is an SMTP protocol error log for virtual server ID 1, connection <connection>. The remote host "<host>", responded to the SMTP command "<command>" with "<error details>". The full command sent was "<full command>". This will probably cause the connection to fail.
Event InformationThis information from some newsgroups may help you:
if you go to the Small Business SMTP connector properties Advanced tab, check "Send HELO instead of EHLO". Restart SMTP and see if that makes a difference."

"The Exchange SMTP virtual server is trying to deliver a message to s_coates_ os@lj-mike.de but there is not such mailbox on the server hosting the lj-mike.de Email mail domain.
If youre not sending messages to this recipient overtly, then some other pr ocess on the server or on one of the mail clients connected to the Exchange server is doing so without your knowledge.
You should scan the server and clients for viruses using the latest virus de finition file.
The IP address resolves to mailin.webmailer.de, the designated mail exchanger for the lj-mike.de Email domain, so your Exchange server is correctly finding the IP address of the mail exchanger fo r the lj-mike.de domain."

"Unless you are having difficulty sending and receiving mail with people you know, then I wouldnt worry about it. Its spam trying to get ya. These messages are a normal part of what Exchange does. It makes mail servers follow the rules. Anyone who breaks the rules get replies like the ones you listed. Typically you wont see these messages. You have up the monitoring level on your Exchange. If you are done troubleshooting Id turn them back down to none or minimal."
Reference LinksHow to troubleshoot the "504 need to authenticate first" SMTP protocol error

Cannot send e-mail messages to a growing list of domains

Considerations on installing Symantec or Norton AntiVirus Corporate Edition on mail servers

Best practices for Symantec AntiVirus Corporate Edition 9.x Auto-Protect on a Microsoft Exchange server

How to troubleshoot mail relay issues in Exchange Server 2003 and in Exchange 2000 Server

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