Hi guys,
I have a script in place which sends out email notification when a new client joins the network.
The script looks for non-static addresses.
I want to exclude a hostname from this notification, but cannot figure this out from the script.
Update: solution is here:
https://forum.mikrotik.com/viewtopic.php?f=9&t=177581#p872770
You mean exclude hostname that have specific name like “android-7b87234bc987” or “iPhoneNormis” 
Or you do not want receive the mail if the iPhone change again the MAC address?
To be more precise, I run Docker on a raspberry PI and it has a bug when restarting containers, as these request IP addresses from DHCP server with a random MAC address, but with static hostname.
The containers have their own static IP addresses already set, so the allocated IP addresses won't ever be used (I scheduled a task to clear this up on a regular basis)
So in short I want to exclude these leases from the email alerts by filtering them out based on hostname.
Now you can do that with my script
Use this as model:
# start and stop the list with ; separate each element with ; no space
:local HostnamesToSkipNotification ";pihole1;pihole2;pihole3;"
/ip dhcp-server
:if ($leaseBound = 1) do={
:local leasehostname $"lease-hostname"
:if (!($HostnamesToSkipNotification ~ ";$leasehostname;")) do={
# place here what you want run
}
}
I hate to say this, but it doesn’t work.
For the sake of testing I only added :log info “TEST” as action, to be sure I’m not messing up the script.
Result doesn’t show up in the logs, and no email is sent, when action is /tool e-mail.
Put the modified script on forum
# start and stop the list with ; separate each element with ; no space
:local HostnamesToSkipNotification ";raspberry-pi;"
/ip dhcp-server
:if ($leaseBound = 1) do={
:if ($HostnamesToSkipNotification ~ ("[^(;".$"lease-hostname".";)") ) do={
:log info "test"
}
}
fixed, please modify your old post and remove the wrong script
# start and stop the list with ; separate each element with ; no space
:local HostnamesToSkipNotification ";raspberry-pi;"
/ip dhcp-server
:if ($leaseBound = 1) do={
:local leasehostname $"lease-hostname"
:if (!($HostnamesToSkipNotification ~ ";$leasehostname;")) do={
:log info "not raspberry-pi"
}
}
Thanks, this works!
You rock!
Very thanks! 
, thanks.
@rextended just a little fine tune request if I may, I am receiving alerts for static DHCP clients as well, I am assuming that the “dynamic” property should be added somewhere, but I am not so good in editing scripts, so maybe you can give a hint where and how should I modify it.
Thanks!
Later edit: nevermind, I think I solved it.