Sarcastic letter closing

https://mamachee.com/2010/07/01/normal-funny-unique-and-loving-ways-to-end-your-letters-notes-e-mails-conversations-tweets-posts/

https://www.brafton.com/blog/email-marketing/funny-email-sign-offs/

https://www.examples10.com/e/funny-letter-closings/

https://www.careercontessa.com/advice/how-to-end-an-email/

http://answers.google.com/answers/threadview/id/547441.html

https://www.democraticunderground.com/discuss/duboard.php?az=view_all&address=105x5199097
https://www.gradtouch.com/advice/article/content-funny-self-isolation-email-sign-offs-during-coronavirus-pandemic

https://www.quora.com/What-are-the-best-closings-for-a-love-letter
https://foliocollaborative.org/gy5bm/archive.php?7edb38=best-wishes%2C-warmest-regards