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Where can I find comprehensive lists of known disposable email domains to block?

Summary

Finding comprehensive lists of disposable email domains is a common challenge for those looking to maintain clean email lists and prevent abuse. While many public and private sources exist, the dynamic nature of these domains means that a truly comprehensive list requires continuous updating and careful vetting. Many marketers create and maintain their own lists, often starting from publicly available resources and refining them based on their specific needs and observed activity.

What email marketers say

Email marketers frequently discuss the challenges of managing disposable email addresses, often seeking shared resources to block them effectively. They emphasize the importance of having up-to-date lists to maintain email list hygiene and prevent issues like spam complaints or fraudulent sign-ups. Many have experimented with creating their own internal blocklists, recognizing that publicly available resources, while helpful, may not always be exhaustive or current enough for their specific needs.

Marketer view

Marketer from Email Geeks explains they previously compiled a list of over 700 disposable email domains, which they blocked from being accepted for sign-ups, highlighting the ongoing effort required to maintain such a list.

10 Aug 2021 - Email Geeks

Marketer view

Marketer from Reddit shares that they found a list of approximately 1,000 disposable domains on Reddit itself, indicating that community forums can be valuable sources for initial data.

10 Aug 2021 - Reddit

What the experts say

Experts in email deliverability and anti-abuse emphasize that a nuanced understanding is required when dealing with disposable email domains. They caution against blindly trusting third-party lists, as these can sometimes contain legitimate catch-all domains or general email providers. The core objective behind blocking these domains should drive the strategy, focusing on preventing specific types of abuse rather than simply rejecting all temporary addresses.

Expert view

Deliverability Expert from Email Geeks warns against taking third-party lists of disposable email domains at face value, as some may include catch-all domains that are not truly disposable.

10 Aug 2021 - Email Geeks

Expert view

Deliverability Expert from Spam Resource notes that the term 'disposable' can apply to any email address, even from major providers like Gmail, if a user decides to treat it as such by marking emails as spam, challenging traditional definitions.

15 Jan 2024 - Spam Resource

What the documentation says

Technical documentation and research often delve into the mechanics of disposable email domains, explaining how they operate and why they pose a challenge for email senders. These sources highlight that a comprehensive understanding involves not just identifying domains, but also comprehending the underlying services that facilitate temporary email creation, the reasons for their use, and the technical indicators that can help distinguish them from legitimate email services.

Technical article

GitHub documentation for disposable-email-domains states that the repository offers a list of domains frequently used for creating dummy user accounts to spam or abuse services, providing a public, community-maintained resource.

01 Jan 2024 - GitHub

Technical article

WhoisXML API documentation mentions that their disposable email domains list contains over 125,000 temporary and fake domains, actively monitoring more than 2,000 throwaway email service providers to ensure comprehensiveness.

15 Feb 2024 - WhoisXML API

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