diff --git a/src/communication/HISTORY.rst b/src/communication/HISTORY.rst
index d0ae83a113..b1bfd07cd3 100644
--- a/src/communication/HISTORY.rst
+++ b/src/communication/HISTORY.rst
@@ -2,6 +2,10 @@
 
 Release History
 ===============
+1.11.2
+++++++
+* Adding an error message for incorrect formats of inline attachments in Email communication send mail.
+
 1.11.1
 ++++++
 * Fix bug in Email services - send email with attachments.
diff --git a/src/communication/azext_communication/manual/custom.py b/src/communication/azext_communication/manual/custom.py
index 432be5a883..df211a51b9 100644
--- a/src/communication/azext_communication/manual/custom.py
+++ b/src/communication/azext_communication/manual/custom.py
@@ -378,6 +378,11 @@ def prepare_attachments(attachments, attachment_types, inline_attachments):
 
         # Process inline attachments
         for j, inline_attachment in enumerate(inline_attachments):
+            if inline_attachment.count('/') != 1:
+                raise CLIError(
+                    f'Incorrect format for inline attachment: {inline_attachment}. '
+                    'Format should be: FileLocation/ContentId, example: "ImageName.png/image".'
+                )
             attachment_name, content_id = inline_attachment.split('/')
             inline_attachment_type = attachment_types[len(attachments) + (j)]
             attachment_content = __get_attachment_content(
diff --git a/src/communication/azext_communication/version.py b/src/communication/azext_communication/version.py
index d58dd16691..7a498b8586 100644
--- a/src/communication/azext_communication/version.py
+++ b/src/communication/azext_communication/version.py
@@ -4,7 +4,7 @@
 # --------------------------------------------------------------------------------------------
 
 
-VERSION = '1.11.1'
+VERSION = '1.11.2'
 
 
 def cli_application_id():