Why do email notifications sometimes end up in the spam folder?

At Refybe, we take multiple measures to ensure reliable email delivery, including using professional email delivery services with dedicated sending infrastructure. However, email providers such as Gmail or Outlook may still flag messages as spam based on the subject line or content. To reduce this risk, we recommend writing clear and expected email messages and avoiding words or phrases commonly associated with spam, such as "guaranteed prize", "raffle", or "gamble".