Hi Ivo,

I have been getting unusual emails generated from websites which I have used inspire templates as the base for them.

I am the server admin so I get any undelivered emails and they are trying to generate an email going to yandex.ru

However they also include the following - the template name changes depending on which template I have used

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

office@oxygen.com
host mxa-00176a04.gslb.pphosted.com [67.231.149.53]
SMTP error from remote mail server after RCPT TO::
550 5.1.1 No such user - pp

The one thing I figured out is that your templates have an active htaccess file however they do not have the standard Joomla content which blocks a number of simple exploits.
I suggest you add this to your templates.

The other thing I added for the undelivered email was this little additional code to the htaccess - to block this particular anomaly.

# Block Spammer User Agent
ErrorDocument 503 "Your connection was refused"
RewriteEngine on
RewriteCond %{HTTP_USER_AGENT} Mozilla/5\.0\ \(Windows\ NT\ 10\.0;\ WOW64;\ rv\:45\.0\)\ Gecko/20100101\ Firefox/45\.0 [NC]
RewriteRule .* - [R=503,L]

This is in case other people are having this problem.

Cheers
Jim