Fine-tune Email Frequency By Tim Karpisek on 4 August 2009 in Email Marketing, Trends, Tips, Targeting When wondering how often you should send emails, keep in mind that each audience and segment is different and should be treated accordingly. The only way to know the answer to this question is to test. Some high-end retailers can send daily, while others with less cult-like following could see a spike in unsubscribe rates if they began sending weekly. Whether the intent is to sell or inform, every email should include valuable content. If the content is relevant and valuable, frequency becomes secondary.