MikroTik

foreach i in=[ppp active find ] do={
local name [ppp active get value-name=name $i];
local ipaddr [ppp active get value-name=caller $i];
:log info "Active PPTP connection with username: $name, IP Address of caller: $ipaddr";
/tool e-mail send to="example@gmail.com" tls=yes body="Active PPTP connection with username: $name, IP Address of caller: $ipaddr" subject="PPTP connection";
}

:local FromEmail "myfromaddress@mydomain.com"
:local ToEmail "mytoaddress@mydomain.com"

:foreach i in=[/ppp active find where uptime <1m] do={
:local Addr [/ppp active get $i caller-id]
/tool e-mail send user="$FromEmail" from="$FromEmail" to="$ToEmail" subject="$[/system identity get name] - New L2TP Connection" body="New L2TP connection from $Addr at $[/system clock get time] $[/system clock get date]";
}