Data Quality, Deduping, and Appending Systems - Marketing Rockstar Guides lots of ideas there and at openprise.com, ringlead, etc. and here in the forums.
They are translated to SQL queries on the backend. If you get a rare error, you can sometimes see the code in the browser.If you want to know SQL or related languages, it might be ...
If they were Deleted in SFDC before your sync, pretty sure they would not be seen by Marketo.Your situation sounds a bit different though...can you describe more?
So Marketo is not sending the email or the recipient isn't getting it?Are the records Email Invalid=FALSE and Email Suspended=FALSE?Are the email addresses formatted correctly?
Relayware plugs into SFDC.Marketo itself doesn't handle this scenario well, so you should really think through the entire process and how/if you want Marketo to see such records. I...