diff --git a/mail_check_mailbox_size/README.rst b/mail_check_mailbox_size/README.rst
index 290d334d..8ca401f4 100644
--- a/mail_check_mailbox_size/README.rst
+++ b/mail_check_mailbox_size/README.rst
@@ -27,6 +27,8 @@ Check mailbox size
Send an email with a summary of remote IMAP mailbox folders, with their total space used.
+This is especially relevant in cases where invoices are received by email to make sure they can get through.
+
**Table of contents**
.. contents::
diff --git a/mail_check_mailbox_size/static/description/index.html b/mail_check_mailbox_size/static/description/index.html
index 50101e5b..2ba873d7 100644
--- a/mail_check_mailbox_size/static/description/index.html
+++ b/mail_check_mailbox_size/static/description/index.html
@@ -369,6 +369,7 @@ ul.auto-toc {
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
Send an email with a summary of remote IMAP mailbox folders, with their total space used.
+This is especially relevant in cases where invoices are received by email to make sure they can get through.
Table of contents