Email seems to be sent but does not send it

I had some contacts from previous campaigns , I tried to add them to a new campaign , they seem like they complete the 1st email step , but nothing shows in the reports , I do not receive any auto replies etc.

Our team will need to look into your account specifically to help. Please open up a ticket via live chat within your account or by sending a message to help@activecampaign.com. :blue_heart: