Different ESPs and email clients have varying scanning limits, but some common ones include:
Character Limits: Many email clients have a character limit for subject lines and preheaders. Exceeding these limits can result in truncated text. Image-to-Text Ratio: A high ratio of images to text can trigger spam filters. Including more text can help avoid this issue. File Size: Large attachments or embedded media can exceed file size limits, causing emails to be blocked or truncated. Link Count: Excessive links can be a red flag for spam filters, so it’s advisable to limit the number of links.