What tranthidung said.
First off, why do you need so much PMs per day though? Unless you're messaging multiple people for whatever reason, it's probably best to move the conversation to the likes of Telegram or Signal.
Completely agree with you, I am writing them my Discord address, but i got another questions in the PM
Then i cannot answer for a day and they are thnking i am inactive or so.
Unfortunately, i cannot have telegram/signal/whatsapp/viber as my company strict rules - no apps on your phone, no private phone at work. So i am using web version of Discord.
PS: i am not messaging (usually) people, they are messaging me. But it's not a big number of PMs, it's like 4-6 daily