1. Avoid being reported by recipients
i. Don't send large amounts of identical content: set longer sending intervals, add timestamps at the end of messages
ii. Don't send content that violates regulations: sensitive information, malicious scripts, rumors, false information, harmful links, adult content, hate speech, etc.
iii. Don't send spam and hard advertisements: recommend adding message unsubscribe text.
2. Ensure using healthy accounts
i. Don't use virtual cards or second-hand cards
ii. Don't use accounts registered within 15 days for bulk messaging
iii. Warm up new accounts for at least 3 months, sending around 50 safe messages daily