I’m used to seeing logos from email service providers in the footers of email, but these are mostly the free and inexpensive platforms. Higher end brands try to mask their technology providers so that there is only one brand shown in the email. While an extra logo may not be too disruptive or confusing to recipients, there is no need to provide free advertising in the message. I received an email that had the logo of a higher end marketing automation platform and it definitely jumped out at me. I’ll have to keep an eye on this to see if it is a growing trend.