Yahoo!Mail uses captcha to fight spam.

Was just checking my Yahoo emails when after responding to one client, I was prompted with a “send mail” verification that uses a captcha system.

It was unusual actually since most of the emails I replied to today did not prompt me with captcha verification. I tried again and the email was sent thru without it.

Then I realized that it must be how I wrote my reply which was mostly in Taglish (Tagalog-English). That could have triggered it. It’s a nice feature but for the un-initiated, it could mean not being able to realize that your email replies didn’t reach your recepient because you forgot to fillup the captcha before closing your Yahoo!Mail.