EmailDroppedAllRecipientsSuppressed

Question

EmailDroppedAllRecipientsSuppressed

Yeong Jong Lim 0

We are encountering an issue while attempting to send emails to one of our users. The error message received is: EmailDroppedAllRecipientsSuppressed.

The email was not created when we first tried to send the email, but now that the email has created, but we are still unable to send the email.

Vimal Lalani 170 Reputation points Microsoft External Staff Moderator

2025-08-01T05:55:23.7633333+00:00
Hi @Yeong Jong Lim

Thank you for posting your question on the Microsoft Q&A forum!

From your description, it seems you're encountering the EmailDroppedAllRecipientsSuppressed error while trying to send emails to a user. You are unable to send emails successfully.

This error usually means that the recipient email address has been suppressed due to previous delivery failures—such as sending to a non-existent or invalid email address. Azure Communication Services (ACS) maintains an internal suppression list to prevent repeated delivery attempts to problematic addresses.

I have seen the same error before when an email address was suppressed, so I was able to reproduce the issue you are facing

To check and resolve this issue:

Go to the Azure Portal

Navigate to your Azure Communication Services resource

In the left-hand menu, select Email > Suppression List To check and resolve this issue:

Go to the Azure Portal

Navigate to your Azure Communication Services resource

In the left-hand menu, select Email > Suppression List

Look for the suppressed email address and review the reason

If needed, you can request removal from the suppression list

Feel free to post back if you have more questions or need help with the workaround.
Yeong Jong Lim 0 Reputation points

2025-08-01T06:04:48.8933333+00:00

Hi @Vimal Lalani , I have checked that I do not have any suppressed email list.
Yeong Jong Lim 0 Reputation points

2025-08-01T08:43:09.3266667+00:00

Hi @Vimal Lalani , I understand the globally managed suppression list. I would like to request for one to be removed manually. Thanks.
Vimal Lalani 170 Reputation points Microsoft External Staff Moderator

2025-08-01T11:21:59.2366667+00:00

Hi @Yeong Jong Lim

Thanks for reaching out. To request the removal of an email address from the globally managed suppression list, you’ll need to open a support request through the Azure portal. This is the standard process for such cases.
Yeong Jong Lim 0 Reputation points

2025-08-01T11:26:01.3966667+00:00

Hi @Vimal Lalani , there is no support request that I can open from the Azure portal. I am already the owner of a subscription, but there is no place for me to open a support request. There is no such button anymore.

1 answer

Your answer

Vimal Lalani 170 Reputation points Microsoft External Staff Moderator

2025-08-01T05:55:23.7633333+00:00

Hi @Yeong Jong Lim

Thank you for posting your question on the Microsoft Q&A forum!

From your description, it seems you're encountering the EmailDroppedAllRecipientsSuppressed error while trying to send emails to a user. You are unable to send emails successfully.

This error usually means that the recipient email address has been suppressed due to previous delivery failures—such as sending to a non-existent or invalid email address. Azure Communication Services (ACS) maintains an internal suppression list to prevent repeated delivery attempts to problematic addresses.

I have seen the same error before when an email address was suppressed, so I was able to reproduce the issue you are facing

To check and resolve this issue:

Go to the Azure Portal

Navigate to your Azure Communication Services resource

In the left-hand menu, select Email > Suppression List To check and resolve this issue:

Go to the Azure Portal

Navigate to your Azure Communication Services resource

In the left-hand menu, select Email > Suppression List

Look for the suppressed email address and review the reason

If needed, you can request removal from the suppression list

Feel free to post back if you have more questions or need help with the workaround.
Yeong Jong Lim 0 Reputation points

2025-08-01T06:04:48.8933333+00:00

Hi @Vimal Lalani , I have checked that I do not have any suppressed email list.
Yeong Jong Lim 0 Reputation points

2025-08-01T08:43:09.3266667+00:00

Hi @Vimal Lalani , I understand the globally managed suppression list. I would like to request for one to be removed manually. Thanks.
Vimal Lalani 170 Reputation points Microsoft External Staff Moderator

2025-08-01T11:21:59.2366667+00:00

Hi @Yeong Jong Lim

Thanks for reaching out. To request the removal of an email address from the globally managed suppression list, you’ll need to open a support request through the Azure portal. This is the standard process for such cases.
Yeong Jong Lim 0 Reputation points

2025-08-01T11:26:01.3966667+00:00

Hi @Vimal Lalani , there is no support request that I can open from the Azure portal. I am already the owner of a subscription, but there is no place for me to open a support request. There is no such button anymore.

Answer 1

Hi @Yeong Jong Lim

Thank you for getting back with the update.

In addition to the domain-level/user-level suppression list, Azure Communication Services also maintains a globally managed suppression list to help protect sender reputation.

Reference: Understand sender reputation in Azure Communication Services email - An Azure Communication Services article | Microsoft Learn

Azure automatically tracks email addresses that have experienced hard bounces or persistent delivery failures when sent through ACS. These addresses are added to a global suppression list to avoid future attempts and maintain healthy sending practices.

Here are the stages involved in the lifecycle of a suppressed email address:

Initial suppression – When an email address encounters its first hard bounce, it is added to the suppression list for 24 hours.
Progressive suppression – If another hard bounce occurs during the initial suppression period, the suppression duration increases to 48 hours. With continued delivery failures, this period may progressively extend to 96 hours, and then up to 7 days.
Automatic removal – Suppressed email addresses are automatically removed if no emails are sent to them during the suppression period.
Drop in delivery

Maximum duration – Email addresses can stay on the managed suppression list for up to 14 days.

Vimal Lalani 170 Reputation points Microsoft External Staff Moderator

2025-08-12T08:38:52.3366667+00:00

Hi @Yeong Jong Lim

Your mail id is also removed from suppression list, we are able to send test mail to that id from ACS.

I hope this helps!

Could you please confirm?

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EmailDroppedAllRecipientsSuppressed

1 answer

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