What can we do ? if some of registers are fake.

[chongbing]

Hi datahell,

Some of users registered from our Elxis CMS. I found that these register's email were fake so i deleted it.
After that we still got new register's emails from Elxis system. Because we configured it as "account activation" by email if users registered.
These emails are send to us again and again, It's kind of annoying. The email content are as below. What can we do to stop that system send an email us if user's are fake ?  Thanks.

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This message was created automatically by mail delivery software.
A message that you sent has not yet been delivered to one or more of its
recipients after more than 48 hours on the queue on vps3626.inmotionhosting.com.

The message identifier is: 1Zp6i2-00014j-6D
The subject of the message is: Thanks for your registration
The date of the message is: Thu, 22 Oct 2015 03:38:34 +0000

The address to which the message has not yet been delivered is:

irateoba@qwkcmail.com
host mail.qwkcmail.com [5.61.38.11]
Delay reason: SMTP error from remote mail server after initial connection:
421 Too many concurrent SMTP connections; please try again later.

No action is required on your part. Delivery attempts will continue for
some time, and this warning may be repeated at intervals if the message
remains undelivered. Eventually the mail delivery software will give up,
and when that happens, the message will be returned to you.

[datahell]

You can block spam domains in 2 ways:

1. Administration > Settings > Tab "Users and registration"
Excluded domains = Type a comma separated list of domains from which you wont accept emails during registration.
Example: badsite.com,spamnet.org,etc...

2. Set special rules on Elxis Defender "Custom" file and enable the "C" (Custom) option in Elxis configuration.
includes/libraries/elxis/defender/custom.php
Here is a sample rules that will block a specific email :
array('inmatch', 'rawpost', 'something@example.com', 'Not accepted email'),
To block the whole "example.com":
array('inmatch', 'rawpost', '@example.com', 'Not accepted email'),

[chongbing]

Will try and to see it.

Thanks datahell !