Most of my customers do not receive their emails because they say they go to spam. I submitted a support ticket a while back and got nothing out of it. I even tried sending emails from the shipping@shipstation address (by not inputting an email address) and my customers still reported emails going to spam. The support ticket was:
Shipstation in general needs to do something about emails sent to spam. As far as I can tell, it's an issue you guys have been "working on" for 4-5 years.
I've tried to do everything on my end to fix the SPF/DKIP/DMARC records but nothing works. My only option at this point is to send tracking from "shipping@shipstation" or whatever it is, which is unacceptable.