I recently tried to reply to a bank's email using my Microsoft 365 account from GoDaddy. After sending my response, I received an automated error message stating: '550 5.4.316 Message expired, connection refused (Socket error code 10061)'. I suspect this might be related to my SPF, DKIM, or DMARC settings, but the diagnostic results show that they are all passing. So, I'm not sure what the issue is or how to determine where the problem lies. What steps can I take next?
1 Answer
Socket error 10061 definitely points to a connection refusal, not an issue with SPF. It suggests that the bank's server is dropping the connection before anything else can happen. This could be due to a blocking issue at their firewall, a reputation problem with GoDaddy's IPs, or maybe they need a specific configuration that you don't have. To check if your sending IP is blacklisted, you can use a blocklist checker online. If your IP isn’t listed there, then the block is likely on their end, and you should contact the bank's IT department to see if they can whitelist your IP.
Great, but where can I find my sending IP to use that blocklist checker?