Hello @BruceH566 ,
"Unsubscribe" is common language is marketing emails, and straight-up required federally and internationally in a lot of cases - so that wouldn't be causing Gmail to consider them spam. Otherwise every single company's marketing emails would be getting spammed out constantly for Gmail users.
Here's some information regarding how Gmail's Promotions tab works. Here are some general best practices for deliverability.
Deliverability can have a lot of variables, from elements on our side, on your side, on the recipient's side, and in their email system company's side. It's also a generally good idea to set up additional authentication for your emails - whether that's through us if you have a free domain (e.g. Gmail, Yahoo, AOL, etc.) or via self-authentication if you have your own domain (such as through a business or other organization).
If you'd like to learn more about safelisting, and what it entails:
Safelisting domains in a security system
Safelisting email addresses in an email client or security system
If you're wanting more in-depth, specialized insight on your current deliverability, it'd be worth speaking with one of our Deliverability agents.
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William A
Community & Social Media Support