ipn not being sent in sandbox, even though activated

[staxpay]

 This is very frustrating. I have IPN set and it's not triggering. The log shows as below. Transactions are going through and IPN simulator works. If the ipn is set then I can only think this is a sandbox error. Am I missing anything like fully completing the business account or confirming email, which never arrived in my inbox. Help would be greatly appreciated.

>Instant Payment Notification (IPN) history
>No IPN messages were found for the past 24 hours.

[MTS_Justin]

Hello,

Please share the email address for the sandbox account where you have setup IPN so I can review the recent activity on the account.

[staxpay]

Can I pm you my email 

[MTS_Justin]

Hello,

Unfortunately not, PM's are disabled for security reasons.

You can submit a support ticket with the relevant information and then share the support ticket reference number here so I can review it.

https://www.paypal.com/mts