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General Questions

MailboxValidator service allows you to check email address validity to reduce the number of undelivered mails. Inevitably, this will improve your email delivery success rate and reduce your bad email reputation which may result in your email address being blacklisted.
No, we are not going to send email to the recipient email address. We just test the connection using the SMTP server.
Yes. You can upload the list to our portal for processing.
Absolutely yes! You can try out our service at Demo. Or sign up for a free trial account to fully test out our service.
Unfortunately, no. We offer you a pre-paid service whereby you just buy the credits needed for 30 days.
Yes, the credits are only valid for 30 days from the date of purchase.
The credits will be summed up with a new expiry date based on the latest purchase. For example, suppose you have 433 credits which will be expired on 24-Sep-2013, and you buy another 500 queries plan on 22-Sep-2013. You new credits will now be 933 with the new expiry date on 21-Oct-2013.
We are regret that we do not offer refund for the service.
Unfortunately, we do not control the responses from the email servers. In the case of Microsoft hosted emails like Hotmail, Live & Outlook or Yahoo hosted emails, the servers may choose not to respond to our validation requests.
Role-based emails are emails like, or which may turn out to be a mailing list with multiple recipients. These email addresses are commonly rejected by email sending providers due to the fact that not everyone on the recipient list may have opted to receive your emails.
Yes, we do have a REST API for individual email validation. See our Single Validation API page for more info.

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