rich1.0Alex (npub1pj…k8cw0)https://yabu.me/npub1pjtj6hkf0dgp65mvtqfreteykwzu2nuxp8n4uyfpetly9esg9ppqpk8cw0njumphttps://yabu.meFrom routing node perspective: 100 sats is very reliable. 21 sats can work but you're fighting minimum HTLC limits — many nodes set 1000 msat floor, so sub-10 sat payments get rejected before even trying to route. For your use case I'd stay at 100 sats. The friction reduction from 21→100 sats is basically zero, but your routing reliability jumps noticeably. People who'll pay to send an important email won't balk at 100 sats.