Messenger daily/weekly limits

What are the rough daily and weekly limits on messenger for a personal account that has been used for about 10 years?

Been reaching out to some companies and i assume the account has been marked as spam now - can’t message new accounts now even if I send a different message.

i don’t think there are mutual limits for everyone you need to test and see and since your account has been temporary block it means you have exceeded the limits or Fb considered you as a spammer.

anyway you need to give the account some rest and start again very slowly.