When using your Gmail account to send emails, remember that Google may impose a daily limit on sending emails. If you run into these limits, don't panic. They often occur with new email accounts as Google assesses whether the account might be automated or operated by a bot.
Encountering these limits won't affect your deliverability process or harm your domain's reputation.
What to do?
1) Cease all email campaigns from this address
2) Deactivate Folderly
3) Wait 48 hours
4) Reactivate Folderly with a sending limit of 50 messages daily
5) Make sure that there are no bounce messages and confirm that the limits have been lifted
6) Resume email campaigns from the mailbox with a limit of 20 per day, gradually increasing thereafter