Hello.

I would check your local system to see if you have any rogue perl processes running. These are generally the cause of being blacklisted for a dictionary attack, which implies that a script is running on your local server.
Generally, you can spot them by the amount of CPU time, and they try to 
mask the process id.
The end of DATA command is just the sequence at which it was denied. 
It's standard.
-- Matthew


li...@lazygranch.com wrote:
<i...@anotherdomain.com>: host smx1.web-hosting.com[209.188.21.38] said: 550 The
    sending IP (my dotted quad) is listed on https://spamrl.com as a source of
    dictionary attacks. (in reply to end of DATA command)
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Is the "in reply to end of DATA command" significant?

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