Several factors can contribute to high complaint rates:
Poor List Quality: Sending emails to unverified or outdated email addresses increases the likelihood of complaints. Irrelevant Content: If your emails do not provide value to the recipients, they are more likely to mark them as spam. Frequency of Emails: Sending too many emails in a short period can annoy recipients. Misleading Subject Lines: Using clickbait or misleading subject lines can lead to frustration and complaints. Lack of Personalization: Generic emails that do not address the recipient's interests are more likely to be marked as spam.