On vacation. Use Thunderbird. I can get email but not send it.
Get the following error and response from my ISP
Just from reading the message it appears they (your provider) need to whitelist the IP address possibly. We do not typically troubleshoot issues like this as we do not block and/or filter traffic for your connection.
On Aug 24, 2020 17:10:13, John Johnson wrote:
> I use Thunderbird When trying to send email through my ISP (Cox, Gainesville Fla) I get the following error message. No issues with downloading email
> An error occurred while sending mail: The mail server sent an incorrect greeting: cxr-obgw-5001a.stratus.cloudmark.com cmsmtp 18.104.22.168 blocked. Refer to Error Codes section at www.cox.com/.../email-error-codes.html for more information. AUP#CXDNS.
> On their site the info on th error info is as follows.
> CXDNS There was an issue with the connecting IP address Domain Name System (DNS).
> The Reverse DNS (rDNS) lookup for your IP address is failing.The Reverse DNS (rDNS) lookup for your IP address is failing.
> Confirm the IP address that sends your email.
> Check the rDNS of that IP address. If it passes, then wait 24 hours and try resending your email.
> No idea how to do this.
> Cox DNS: Primary DNS: 22.214.171.124. East Coast