SMTP error from remote mail server after initial connection:

Greetings, I'm a complete newb boob and have been given a job to find out why a server is being ambushed by spam. I get many of these results (look at attachment) with a variety of Sender addresses and receiver address. Because of these, we are unable to sent out tests on websites because the relay limit is hit. I do not know where to begin to find the source of the problem. The server is hosted by another company, and they are not able to help unless we pay then $$$.$$ a month to fully manage it. So I hope someone out there can help me to understand how I can find the culprit. Thank you.


More Info:
Event: failure
Sender User: develope
Sender Domain: example.in
Sender: thelma_gibbs@example.in[/EMAIL]
Sent Time: Feb 26, 2016 9:46:21 PM
Sender Host: localhost
Sender IP: 127.0.0.1
Authentication: localuser
Spam Score: 0
Recipient: user_64@example.ru[/EMAIL]
Delivered To:
Delivery User:
Delivery Domain:
Router: send_to_smart_host
Transport: remote_smtp
Out Time: Feb 26, 2016 9:46:21 PM
ID: 1aZXiQ-0007Ix-79
Delivery Host: dedrelay.where.someexample.net
Delivery IP: 208.109.xx.xx
Size: 1.14 KB
Result: SMTP error from remote mail server after initial connection: 554 p3plsmtpout003.prod.phx3.yetanotherserver.net : HOSTING RELAY : ZXiQaesRCfvQD : DED : You've reached your daily relay quota - 50.63.xx.xx

cPanelMichael

March 07, 2016 17:40

Hello :) The following documents are a good place to start: How to Prevent Email Abuse - cPanel Knowledge Base - cPanel Documentation How to Keep your Email out of the Spam Folder - cPanel Knowledge Base - cPanel Documentation You can also search the term "spam source" on our forums to see several threads where determining the source of SPAM is discussed. Thank you.

SMTP error from remote mail server after initial connection:

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