Played around a lot and modified frontend.funtions.p hp so, that it matches now most cases. One thing I changed is, if there's an email address, regardless if there's a 'mailto:' tag or not, we want to protect it anyway. With this new replacement I was also able to fix the problem with the additional parameters like '?subject=...'. The solution was quite easy - I added it to the encryption and is now part of the encrypted string.
Be careful with the replacement strings. If you use tags like <em style=""> or <img src="/path/to/at.gof">, the ending quotes may mess up the link. I think, replacing '@' with '(at)' and '.' with '(dot)' is quite enough.
Please test it on your own risk, but I think it is quite safe, it works for me quite fine.
P.S.: Christian, when you verify the modified class, could you create a new package (maybe v.0.31)?
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