Send & Track emails do not have aligned RFC5321.MailFrom and RFC5322.From fields, thus fail DMARC checking as per acrobat.com policy of "p=reject", which instructs receiving MTAs to reject or bounce misaligned messages.

Proof attached.

Please either:
A) allow users to change the RFC5322.From field in the product UI
B) or, create a separate subdomain for Send & Track messages with DMARC policy of "p=none"

This will ensure better deliverability.