No one can answer.
What is your DM, will it trigger spam warnings due to content.
Are you including a link, is it blacklisted.
Has the account prior usage or was it created 3 years ago and never used (so is not really a 3 year old account and not that much better than an account created yesterday)
Has the account had warnings / blocks previously for DMs? For other functions?
Who are you going to DM? Any previous contact with them?
Will the account just be used for DMs, or will it act like a normal account.
The days of expecting a limit for (xyz) feature and then doing (limit-1) each day are long gone.