sendmail is in my opinion unessisary advanced and compicated for the most installations and there are a more simpler solution already in base for OpenBSD which is smtpd. This daemon is not active by default but it’s simple to change. Stop sendmail pkill sendmail Edit /etc/mailer.conf and change to the following sendmail       /usr/sbin/smtpctl send-mail     /usr/sbin/smtpctl mailq           /usr/sbin/smtpctl makemap         /usr/libexec/smtpd/makemap newaliases      /usr/libexec/smtpd/makemap hoststat        /usr/libexec/sendmail/sendmail purgestat       /usr/libexec/sendmail/sendmail Rebuild aliases database newaliases Make…