Junk / Spam Emails from various ports like mail.ru

Hello Friends, Since last one month I am getting so much Junk / Spam Emails from many email ids ( all this email are specially receiving from my contact forms of my websites).

Is there any solution to stop this unnecessary emails? I had tried all best possible ways to check it with captcha system, block the users based on email ids / ips but still next day i get lot of mails from same pattern.

Thanks in Advanced.

What type of captcha did you try? Some are more effective than others.

How was your contact form made, was it a custom script you made yourself, or a script or service from a third party?

I had tried Google Recaptcha, Invisible Captcha, Custom PHP file based Number and Text Captch, Honeypot, Human/Robot Radio Pattern. all kind of captcha are our in house developed coding.

I find checking the HTTP referer quite effective. If it doesn’t exist I consider it spam.

I do not expect links from my contact form so I check if it contains a link and if it does the email is not sent.

I have a notice on the page to that effect.

You may be able to use one of the spam databases in your contact form

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