Email marketing can be influenced by various factors, of which spam filters and sender reputation are the two main culprits. While specific statistics may vary, here are some notable insights, according to HubSpot:
There are 4 billion daily email users. This number is expected to climb to 4.6 billion by 2025. (Statista)
More than 306 billion emails are sent and received each day. (Statista)
64% of small businesses use email marketing to reach customers. (Campaign Monitor)