Email marketing performance factors and deliverability issues

Email marketing performance can be impacted by several technical and content-related factors. A high open rate combined with a low click rate often indicates a mismatch between the subject line's promise and the email body's content. Common causes for this disconnect include weak calls to action, generic content, excessive links, or poor design. Additionally, privacy features like Apple Mail Privacy Protection may inflate open rate data by pre-loading tracking pixels.

Deliverability can also be hindered by domain or IP blacklisting. Blacklists identify domains or IP addresses associated with spam, phishing, or malware. Because there is no single global blocklist, senders must check various providers. A sender's reputation with specific providers like Gmail is also a critical factor in ensuring messages reach the inbox, even if a domain does not appear on a formal blacklist.