1. Check to make sure your custom domains are set up correctly for email.
MX record and A record for mail.toastmastersclubs.org must be set in the DNS.
2. You need to check for member email addresses that used to be good, but are no longer valid in your Membership Management.
3. Make sure that your email system is not grey-listing *outgoing* email to destinations unknown to your email system system.
4. Put our server address in your contacts for your email system. This effectively whitelists it.
5. We only have one server. It is *seldom* down. All of my updates have to be done on the "live" server, because we have no other recourse. I have methods to keep coding errors to a minimum (contain problems), but sometimes issues still get missed.
6. Keep in mind that email systems are always changing and always tweaking their security. For example, more are using specialized firewalls such as Barracuda. We do what we can to keep up, but it is an ongoing challenge, and do not have the time, money or resources to invest in monitoring services like large companies do.
7. Be careful to not so quickly point the finger at the FTH system (or us). Historically, we know that most issues are user related. (not always, but most of the time) That does not mean that we are tone-deaf and unwilling to assist, but keep in mind that we are volunteers and we are human, too. We do the best we can with what we have to work with.
8. If you really want to help us investigate issues, we usually need more than the typical "we have a this problem". Particularly, with email, we will sometimes need you to do some tests that we dictate so that we can check for specific behavior. Our list server has some testing functionality built into it to allow for this with specific emails.