AmilZola
I pay through my bank’s bill pay on line. I do not go to the vendor’s assorted websites as it takes too much time.
If a vendor is not set up to receive ACH transfers from my bank (and I have three like that). The bank issues a bank check and mails it paying the postage (no charge to me). I just know that when I pay bills, if I enter payment info by 7PM, vendors receive the payment the next business day. If a check has to be mailed, the bank BillPay will show me the day the payment will be received by the vendor.
That said, as an attorney I use the USPS very often. Lots of documents that need to be delivered in hard copy, things requiring signed proof of delivery, etc. so much cheaper than UPS, FEDEX. etc.