diff --git a/FAQ.md b/FAQ.md
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--- a/FAQ.md
+++ b/FAQ.md
@@ -4931,6 +4931,9 @@ You can also long press the person-add icon at the end of the to/cc/bcc/field.
You can define contact groups with the Android contacts app, please see [here](https://support.google.com/contacts/answer/30970) for instructions.
+Please be aware that your email provider might block a message to many recipients.
+If you want to send newsletters to many people, you should use a transaction email service.
+
diff --git a/index.html b/index.html
index dc3a97cb4f..e468c689e4 100644
--- a/index.html
+++ b/index.html
@@ -2517,6 +2517,7 @@ $NotDisplayed
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You can insert the email addresses of all contacts in a contact group via the three dots menu of the message composer. You can also long press the person-add icon at the end of the to/cc/bcc/field.
You can define contact groups with the Android contacts app, please see here for instructions.
+Please be aware that your email provider might block a message to many recipients. If you want to send newsletters to many people, you should use a transaction email service.
(153) Why does permanently deleting Gmail message not work?
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