M&T is one of the banks that have the easier DD via bank ACHs. I've had success in the past using a PUSH initiated from Wells Fargo, CapOne 360, and TD Bank as a trigger. In the past (I can be a DP as late as November), M&T's bonuses post rather quickly (bonus posted the same day the DD posted), so no harm trying the push from Navy and if it doesn't trigger, just pull back the money and try another bank.
Not
@Albort, but the ACH that he is referring it is in fact the bank to bank transfers. But as mentioned, you must PUSH (i.e. initiate the transfer) the money FROM the other bank (i.e. your regular bank for example) INTO the bank you are looking to receive a bonus from. Some who just start have made the mistake of pulling the money (i.e. initiating the transfer through the bank you want to receive the bonus from), and therefore, do not receive the bonus. And more importantly, some transfers count and some don't, so it's trial and error and keeping up with DPs from DOC and reddit.