1. Frequency of Emails: Sending emails too frequently can overwhelm subscribers, leading to email fatigue. 2. Irrelevant Content: Emails that do not provide value or are not tailored to the recipientâs interests can be seen as spam. 3. Lack of Segmentation: Failing to segment your email list means that all subscribers receive the same content, which may not be relevant to everyone. 4. Overlapping Campaigns: Running multiple campaigns simultaneously can result in subscribers receiving several emails in a short period.