Hi. From the Wayback machine. We have an older iMac (2011?) in the office running OS X 10.6.8. The version of Thunderbird is 45.8.0. This system used for Email in updating customers, has been used right up until this past week. We have used GoDaddy for Email for years without any issues, until this week. Godaddy migrated all Email over to Outlook/365 on Monday. We cannot send a thing. Contacting Godaddy's Migration department, we were given a new server (smtp.office365.com) for outgoing Email. It simply doesn't work. Obviously, our entire system is outdated, and needs to be upgraded, but is there any way that we can use this system for now, because if is so important to get these Email message sent! Would any other service/server be compatible with this antiquated system so that we can complete this project? Thanks for taking the time to read this. Jerry jerry@redshark.com