There is a fair chance the visual elements you see in some email, could be from anywhere
however if you could de-personalize a screenshot of an email so we can see only those odd
icons and items said to be (by your husband?) to be evidence of some Gmail, then send it.
Or, if not, don't send something with your personal email info in it.
I have two gmail addresses, from years ago, and use it solely; there has never been any
stars in my email; however almost every email system can add icons to an email. Some
are animated that appear in my spam. I've not see these as an option to add in my gmail.
What is the last part of the email's address? Some are more likely to be scams, etc
than others. You should be able to filter their arrival in your email. Do you use Apple
Mail and if so, what version is it, and what is the OS X?
GMail Help - Google support:
https://support.google.com/mail#topic=3394144
You could read into the Google Help center and other google mail (accounts) information to
see that by default most gmail does not have these. I've used GMail since a few years after
it was available (by invitation; I had to ask for an invite back then and be considered, first)
and even now the only email with all those odd icons, is junk spam or unsolicited phishing.
Sometimes a search online can help find out if your email content is related to a phishing or
other scam because some of them get reported. GMail itself has done a great job of filtering.
Until this past six month, I had not received much of any spam or emoji laden address line
email from anywhere. The ones I get now are clearly phishing/spam & directly go to Spam.
Because I've only used web based email and do not store any in my computer, some of the
issues people had with items (especially in non-Mac systems) from bad content affecting
the computer, I've never had. Occasionally I may save a few email (files, etc) offline. But
nothing of importance is saved in my computers; considering the drive can fail & you lose it.
Perhaps the doubter has to consider other factors in the allegory involved. Not my place. 😐