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[GH-ISSUE #466] [Discussion] Custom domains also flagged as disposable #908

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opened 2026-03-14 11:06:15 +03:00 by kerem · 2 comments

kerem commented

2026-03-14 11:06:15 +03:00

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Originally created by @jthvai on GitHub (May 31, 2023).
Original GitHub issue: https://github.com/anonaddy/anonaddy/issues/466

Since, upon account registration, platforms are also checking MX records for email service providers that they ~~don't like~~ think are disposable (AnonAddy for example) and outright blocking those, creating a custom domain no longer works to avoid being marked as a "disposable email user".

Is there a way to circumnavigate this without violating the DNS spec? (it is likely that pointing the MX record at a CNAME would be sufficient but that isn't compliant)

Originally created by @jthvai on GitHub (May 31, 2023). Original GitHub issue: https://github.com/anonaddy/anonaddy/issues/466 Since, upon account registration, platforms are also checking MX records for email service providers that they ~~don't like~~ think are disposable (AnonAddy for example) and outright blocking those, creating a custom domain no longer works to avoid being marked as a "disposable email user". Is there a way to circumnavigate this without violating the DNS spec? (it is likely that pointing the MX record at a CNAME would be sufficient but that isn't compliant)

kerem closed this issue

2026-03-14 11:06:21 +03:00

kerem commented

2026-03-14 11:06:26 +03:00

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@jthvai commented on GitHub (May 31, 2023):

Could it be possible to point the MX record directly at the ip that mail.anonaddy.me resolves to?

@jthvai commented on GitHub (May 31, 2023): Could it be possible to point the MX record directly at the ip that `mail.anonaddy.me` resolves to?

kerem commented

2026-03-14 11:06:32 +03:00

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@willbrowningme commented on GitHub (May 31, 2023):

Thanks, I am aware of this. Do you know which third-party service is doing it?

I know of https://quickemailverification.com/tools/disposable-email-address-detector that have singled out AnonAddy and incorrectly list even custom domain aliases as disposable. They do not however list Duck email, Firefox relay or Simple Login as disposable. I have contacted them multiple times but they have not responded.

Unfortunately it's not possible for an MX record to point directly to an IP address, it must be a hostname. It is not possible to point an MX record to a CNAME either.

Perhaps if more people contacted these services and asked them to correctly categorise the service as not disposable they may listen.

@willbrowningme commented on GitHub (May 31, 2023): Thanks, I am aware of this. Do you know which third-party service is doing it? I know of [https://quickemailverification.com/tools/disposable-email-address-detector](https://quickemailverification.com/tools/disposable-email-address-detector) that have singled out AnonAddy and incorrectly list even custom domain aliases as disposable. They do not however list Duck email, Firefox relay or Simple Login as disposable. I have contacted them multiple times but they have not responded. Unfortunately it's not possible for an MX record to point directly to an IP address, it must be a hostname. It is not possible to point an MX record to a CNAME either. Perhaps if more people contacted these services and asked them to correctly categorise the service as `not disposable` they may listen.

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