Including a branded email signature will have little direct effect on deliverability but could indirectly affect email performance. As mentioned, an email signature adds credibility and professionalism to your email.nnAs such, a recipient is likelier to open and engage with your emails. More positive interactions with emails sent from your domain will improve overall deliverability.nnOn the other hand, an email signature with clunky HTML code or oversized images could trigger a spam filter and cause a deliverability issue. But spam filters focus primarily on subject lines, domains, and email content.nnEven so, it would be best to have a clean and simple email signature with appropriately sized images, consistent fonts, etc. It should be part of an overall email profile that follows best practices.