[Typo3] spamProtectEmailAddresses=-3 and underscores in email-addresses

[tapio]

Christian Stuedemann wrote:
> Dear list,
> 
> please note: If you use spamProtectEmailAddresses=-3 the underscore
> ("_") in email addresses will be encrypted to a backslash ("\"). This
> backslash might not be decrypted correctly. It might just be ignored. In
> this case the underscore is missing in the decrypted email address.
> Solution: Use any other offset (-4..+4) except -3. This will solve the
> underscore problem.
> I don't know if this bug is a general one or if it is just occuring on
> my page. Please check and confirm/disagree.
> 
> Best regards,
> stuedemann

A short question - what is the purpose of (-4..+4)
Does it make differencies when the same email has been defined.