Unsure if junk email or more?

Let me preface this with my husband was unfaithful before.. just once.. in the beginning.. I know addiction isn’t an excuse but he did have an addiction to coke and at the time I didn’t know how serious it was and didn’t allow it.. long story short he cheated with an old friend of mine from high school (we weren’t friends at the time) because she allowed it to happen and partook with him... we separated and everything, did counseling.. and I got 95% of my trust back.. we run a business so I have full access to his phone, email, everything.. well a couple years ago she reached out to him through email and I read it first.. asked what to do with it and he told me “move it junk mail” so I did.. but I still have all his email on my phone.. so I (being insecure because of what HE did) still checked the junk mail to see if she emailed.. to clarify she had emailed him to get some stuff she left at his house but it was super small stuff like a stuffed animal and some worn tennis shoes.. I had messaged her before all of this and said “your stuff is out front, come and get it” but she never did.. UGH that’s just the reason I’m so insecure...

ANYWAYS!! He gets tons of junk mail!! Like porn stuff, of course because he watches porn and we do together.. but some things are just hilarious and it’s just fun for us to read them together and joke about what they say in them..

well I had upgraded my phone and didn’t have access to email so I had to get on his iPad for it.. and there wasn’t anything to suspicious! But there was one email in junk that made me kind question...

The title was “I’m so sorry !!! I hope you can forgive me!! ( ok general spam type)

But the body was “please just talk to me again, I’m so sorry” (usually the spams involve a link or something else)

So I check the sender and it’s a basic nicole@outlook.com and immediately I’m like well there’s no way you can get such a popular name as an email like that..

I pushed it out of my head.. but then I got all the email stuff downloaded on my phone and everything was there! Except that one simple email??? So I got worried and just sent the email a message from my own account and sure enough no response.. I’m pretty sure it was just spam... but I think it’s just bringing me back to the previous infidelity? I feel so stupid even asking this.. to top it off before I could even bring it up he bought me the first real present EVER diamond earrings, as a random thank you.. mind you we been married 2 years.. together 4 and known each other 10+ and he has never, NEVER bought me a gift.. I’m appreciative but I’m thinking maybe he feels guilty??

Sorry update; no it wasn’t read! But I couldn’t find it on any other device.. even the computer.