Also, one should subscribe to the mailop mailing list, which serves as a Distant Early Warning line for email deliverability issues (ie. like NANOG for netops

Also, one should subscribe to the mailop mailing list, which serves as a Distant Early Warning line for email deliverability issues (ie. like NANOG for netops issues). https://www.mailop.org/best-practices/ https://www.mailop.org/best-practices/