If the form is on a webpage you can add Java code to require email to have ".com" On Marketo side you can create a a Smart Campaign to mark them junk if emails don't have ".com" ".org" ".edu" ".io" etc. There are directories which will provide a complete of domains out there.
Hi Riz Alvi, Thank you for your reply. Although that was my other question about email address validation but this is great help. I will write js code for this.
Is there any way we can put validation for date field in marketo?