ONE OF TODAY'S PROBLEMS WITH EMAIL WHEN BIG BROTHERS ARE IN CHARGE

Have you ever had your emails delivered to an unknown server?
The below IP was never set as an MX. VPNs [Tailscale/wireguard/etc] and outbound smtp providers @work?

--------Connecting to 54.203.146.40

220 relay.mailchannels.net ESMTP [143 ms]
EHLO keeper-us-east-1d.mxtoolbox.com
250-relay.mailchannels.net
250-SIZE 104857600
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-SMTPUTF8
250 STARTTLS [174 ms]
MAIL FROM:

SendSMTPCommand: You hung up on us after we connected. Please whitelist us. (connection lost)

LookupServer 1066ms

---Disabled all, but not outbound, yet some emails keep heading there.

These days one must use an outbound smtp for all emails; otherwise, one will be frustrated by the amount of rejected emails should they stick with their own IP address(es).

I however think it is time to start rotating outbound smtp providers.