I have searched extensively for this issue and I cannot find any suggestions beyond the standard SPF, DKIM, DMARC records. Rackspace customer support has been terrible and utterly unhelpful, but I would rather not get into it here. Many of our customers use gmail as their email provider and this is causing a huge business impact for us. This is causing our domain to be marked as suspicious by major email providers such as gmail. We still see the (now non-existent) DL as sender of spam emails. Hundreds of different IP addresses were being used. On inspecting email logs from Rackspace, we found that one of the distribution lists was showing as the sender of thousands of spam emails (clearly spoofed) from our domain. If you already have an SPF record for your specific email domain name, then you will need to include the Jive Cloud email servers. Advanced spam filtering, enhanced SPF stops most spam early. We raised the issue with Rackspace and found that we did not have a DMARC record, which we added about a week ago (SPF and DKIM were added a long time ago). To update an existing SPF record: Login to your DNS management console. This email server is fast, reliable and feature rich, with integrated WebMail. Our emails started going to spam folders for our customers in recent weeks. The SPF record for aol.com includes s SPF records, and the server that received the message from74.6.132.229is a Yahoo mail server, so the message passes SPF validation. We use Rackspace Cloud as our email provider.
I am just a developer handling this issue for our small organization, so apologies in advance if I have missed anything obvious.
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