I obtain my Internet service from CenturyLink.
I have been using for many years Mozilla Thunderbird for my email as my much preferred email service provider.
Recently, the following message has started popping up after I compose an email in Thunderbird and hit the Send button:
“An error occurred while sending mail: The mail server sent an incorrect greeting: 5.7.1 [C18] RBL restriction: Blacklisted by Internal Reputation Service – 220.127.116.11.”
I reinstalled Thunderbird as a possible remedy. The problem persisists.
My vague understanding is that the problem lies with CenturyLink, and NOT Thunderbird. It MIGHT be that they don’t support Thunderbird any longer.
Before I contact CenturyLInk, I want to make sure that they are the right party to contact about the above problem. Getting a live person at CenturyLink to talk to is somewhat of an ordeal.