When does Marketo determine an email address is invalid>

[Anonymous]

When does Marketo determine an email address is invalid? I assume this is once an email is sent and can't be delivered but want to clarify. When a list is uploaded, some leads cannot be uploaded because of errors in their address, so Marketo does some level of email validity check upon import.

[Ravi_Ansal2 · Accepted solution]

Hi Katherine Elliott​,

Marketo don't do any email verifications while uploading the contacts.

The errors that Marketo points out while uploading a list are if they have space in the email or any undefined character.

There are few Lauchpoint plug-in that you can use for email verifier.

I hope this answers your question.