Spammers have several ways to collect valid email addresses: two of their sources are websites and blog sites a third is support forums. Spammers use robots that crawl over all the pages they can reach on the Internet (more or less like search engines’ web spiders do).
The robots scan for mailto: tags or whatever looks like something@something. Any email address published on a web page, blog, forum, etc. risks being collected and used as a target for mass mailing.
It’s also noteworthy that some viruses that spread themselves by email read the browser’s cache of the infected computer to find possible victims: so if an infected computer is used to browse a web page containing your address, the virus might sends itself to you via an infected mail from that computer.
There are simple ways to prevent such spam bots from doing their “dirty work”.
A. Contact forms
The first option on a wordpress.com blog is not to post an email address at all and instead to use a Contact Form on a page or in posts.
If that’s not your choice then the two best ways to post an email address are through the use of an email image generator or through email address “munging”.
B. Email address image generators
Below are links to some free email address image generators:
NOTE: Be sure that you do not link this email address image that you create to your actual email address when posting it as doing so will entirely defeat your purpose.
C. Email address munging
- Here’s another tool like the one above.
- Here’s third tool you can use to obfuscate an email address.
- And here’s another ASCII Email Obfuscator you can use.
D. Displaying your email address image or your “munged” email address on your wordpress.com blog
Reference: Masking Your Email Address