Hisashi Hirajo

Thanks for reading it that closely. That warm-up was easy to miss because nothing looked broken on my end. Every message still passed authentication. The subdomain idea makes sense. I didn't split it because once I'd found the warm-up still sending from a server nobody was reading, the cause was clear enough, and I haven't had a reason to rerun it. Opens from Gmail users were 0.2% in August and about 20% in early October.