A simple yet effective method is to reward e-mail addresses by their decimal character entities. This one replaces each character an e-mail address by its numerical notation according to ISO 10646 (congruent with the Unicode standard) in decimal form.
From
<a href="mailto:example@example.com"> example@example.com this code
becomes the source of the page
Such encoded e-mail addresses and mailto links are still represented by web browsers without problems correctly in writing and are usable, but they should at least be safe from automated address collectors. The software side effort required to "decrypt" is here apparently simply too high.
Absolute security does not exist
Although this method is of course not a hundred percent safe solution, she should protect at least largely against unsolicited e-mails, and at the halfway reasonable cost. The problem is also "packed at the root," saying: You are trying to prevent the concerned e-mail address is in the first place bespammt.
Of course you want the Umwandelung not "have to do it by hand" in numerical notation. A convenient web interface for converting offers about the Email Address Encoder.
