Yes, I have been one of those holdouts who kept a well preserved exim setup running, but I found the time to finally migrate to smtpd, and the experience was so good I wrote a blog post, titled "OpenSMTPD Is The Mail Server For The Future".
It's live at https://nxdomain.no/~peter/time_for_opensmtpd.html or for those who do not mind trading Google tracking for incrementally nicer layouts, https://bsdly.blogspot.com/2026/05/opensmtpd-is-mail-server-for-future.html. The TL;DR is that the transition from exim to smtpd is nothing to be afraid of. Most likely you will enjoy the experience and the result much like I do. All the best, Peter -- Peter N. M. Hansteen, member of the first RFC 1149 implementation team https://nxdomain.no/~peter/blogposts https://nostarch.com/book-of-pf-4th-edition "Remember to set the evil bit on all malicious network traffic" delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.
