Hi Michael, what I did was remove the A tags, as the mail clients usually auto-link email addresses and websites anyways. I tried locating the sanitizing code but python sure is a shitty language to debug :) (at least the way it's used in odoo)

I have exactly the same problem - trying to add a credit card payment link through the link designer - which works, but every & in the link is changed to & which renders the link unusable.

Tilfried have you found a solution for this or posted a ticket somewhere?

--> Is there a way to exclude A-tags from being sanitized?

--> OR is there a way to disable sanitizing at all?