Well seeing as I made this up, years ago, I think I know the meaning.
Lolz, is simply "lol" or, laugh out loud
with a random letter at the end, and z looked the coolest!
"Lol" gets sooooo boring, so switch it up by using "lolz" or create your own!
Lolz! That is so funny!
Die Mails werden von email@example.com versendet. Wir versenden keine Spammails.