Quote from: thoste on November 02, 2024, 03:18:58 PM

Who pays this mining fee? the sender or receiver?
I don't want that the receiver pays any fee.

The sender, since TX fee is determined by subtract total coin on inputs with total coin on outputs.

Quote from: thoste on November 02, 2024, 03:18:58 PM

What if I would accept a transaction within lets say 1 day =~ 144 blocks

Getting a suggested mining fee for that period seems to be not possible.

It's impossible, either from Electrum GUI or console (through function getfeerate()). Although you could use https://mempool.jhoenicke.de in order to make manual estimation.

Quote from: thoste on November 02, 2024, 03:18:58 PM

I remember (at least in former times) that even a mining fee of 0 leads practically to a execution with 1 or 2 days.
That no longer seems realistic, does it?

It's practically impossible, unless you own mining pool where you include your own or miner TX.