Had an exchange of emails with someone, around 4-5 back and forth emails. He then told me that my last reply never arrived. When I forwarded that email again to him, he told me that actually the original reply arrived but landed in spam… he checked it after I forwarded the initial reply.
It’s not critical or even a super important conversation but I think he lied to me. Is there any chance that a reply lands in spam if the last 4 mails in a thread arrived without a problem?
The emails were sent from a custom domain, using Office 365 Business. I have that email address for more than 6 years and I never had a problem with my emails landing in spam or never arriving. It’s the first time I am hearing about it but I think he is duping me.
Edit Thanks all for the replies, it’s good to know that it can happen.
I’d recommend DMARC, sure - every little bit helps! But only because your SPF and DKIM are already aligned.
If you want me to check your work, shoot me a DM with your domain and I can take a look after you’ve done it with something like https://mxtoolbox.com (bookmark that one too, it’s good for checking your records after an edit to make sure the edit went live - just give it up to 72 hours). Or, a screenshot of the settings you’ve entered for the record, and I can validate for you (or mark it up to show changes if they’re needed).