How do ESPs collect Yahoo FBL data using double DKIM signing?

Email marketer from EmailVendorSelection shares that ESP's are able to use shared IPs to send email for multiple clients as they use DKIM, SPF, and DMARC to correctly configure sending and ensure their clients email gets delivered.

Email marketer from Stack Overflow explains that you can configure DKIM for multiple domains by setting up multiple DKIM keys and corresponding DNS records. This allows an ESP to sign emails on behalf of different clients.

Email marketer from Validity shares that Feedback loops are a key component of any email sending program, it allows you to see who is marking your email as spam and take action, if needed. Taking action may require that you unsubscribe the email address that is marking you as spam.

Email marketer from MailerQ shares that to receive FBL reports, you need to sign your emails with DKIM, publish a DMARC record, and set up a dedicated mailbox for abuse reports. The FBL system then forwards reports about spam complaints to this mailbox.

Email marketer from Mailosaur shares that a domain key, also known as DomainKeys Identified Mail (DKIM), is an authentication method that helps verify the sender and ensures that the message was not altered in transit.

Email marketer from Litmus explains that feedback loops are essential for maintaining a healthy email list and sender reputation by providing a direct channel for receiving and acting upon spam complaints from email recipients. Acting on these complaints allows for better deliverability.

Email marketer from SparkPost explains that implementing a feedback loop allows senders to receive complaints directly from ISPs, enabling them to promptly address deliverability issues and improve sender reputation.

Email marketer from Reddit shares that Yahoo FBL can be obtained by setting up a specific mailbox (abuse@yourdomain.com) and registering it with Yahoo. This allows you to receive spam complaints directly.

Email marketer from MessageGears explains that to use a feedback loop correctly, your organization is required to authenticate your email with DKIM and SPF, and provide an abuse reporting mechanism that's readily available to recipients of your messages. Feedback loops cannot operate without authentication.

Marketer from Email Geeks explains that double signing with your ESP domain if you want a simple FBL sign up for all your emails. Order doesn’t matter.

Email marketer from Mailjet shares that feedback loops help senders improve deliverability by identifying users marking emails as spam, allowing the senders to remove them from their sending list.

Marketer from Email Geeks shares it's common for ESPs to double-sign with both the client's and ESP's domain to register and process FBL data. They mention the architecture design where client cohorts should be taken into account when designing your architecture (how you group IP’s, which domains you use for signing, link wrapping etc.).

Expert from Email Geeks shares that they avoided dual DKIM due to concerns about which domain's reputation takes precedence and whether Yahoo might miss signatures. They preferred making YFBL registration a standard domain setup step.

Expert from Spam Resource explains that feedback loops rely on authentication such as DKIM and SPF. He also mentions that ESPs use FBLs to identify spammers and those who aren't following the proper protocols.

Expert from Email Geeks explains two approaches for Yahoo FBL collection: double DKIM signing and independent customer registration. They share that double DKIM signature the ESP signature is not as impactful on reputation as the more specific signature. The standard recommendation is to sign with the ESP domain first, then with the customer-specific domain.

Expert from Word to the Wise explains that feedback loops are a method of improving your email delivery by monitoring spam complaints. ISPs provide these loops to senders who authenticate their mail. Senders then remove complainers from their list, which will result in a better reputation at the ISP.

Documentation from Yahoo Mail Help explains that the Feedback Loop (FBL) allows senders to identify and remove users who are marking their emails as spam. They outline the setup process, including DKIM signing and registration.

Documentation from RFC Editor details the DKIM (DomainKeys Identified Mail) standard, explaining how multiple DKIM signatures can be applied to an email. This standard allows both the ESP and the client to sign the message.

Documentation from Port25 outlines configuration steps in PowerMTA for processing FBL reports, including setting up specific accounts to receive and parse the reports from Yahoo and other ISPs.

Documentation from DKIM.org describes the technical aspects of DKIM, including generating keys, creating DNS records, and signing email messages. This provides a foundational understanding for implementing double DKIM signing.