---
title: "Emails not Sent with Outlook Mail Module - Lasernet Developer"
slug: "emails-not-sent-with-outlook-mail-module"
description: "In previous versions of Lasernet 9 and 10, an error message may appear informing you that emails have failed to send. Read the article for more info."
updated: 2026-03-05T13:15:02Z
published: 2026-03-05T13:15:02Z
canonical: "kb.lasernetgroup.com/emails-not-sent-with-outlook-mail-module"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.lasernetgroup.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Emails not Sent with Outlook Mail Module.

**Applies to:** Lasernet 9, Lasernet Core 10

In previous versions of Lasernet 9 and 10, an error message may appear informing you that emails have failed to send. This issue may begin with some emails failing intermittently and an “Unable to Post; ChilkatLog” error message is present in the Lasernet log, which states the following:

`WindowsError: An existing connection was forcibly closed by the remote host.`

`WindowsErrorCode: 0x2746`

`maxToReceive: 5`

`Failed to receive data on the TCP socket`

`Failed to read beginning of SSL/TLS record.`

Additionally, if you attempt to use **Refresh Access Token** or **Obtain Authorization** on the **Outlook Mail** module, you will receive a dialog with the error “No Response”:

![](https://cdn.document360.io/c831ef63-c6b3-48ee-b443-3e33644e4e2e/Images/Documentation/image-XI1AX7KJ.png)

## Solution

Multiple fixes have been applied to the **Outlook Mail** module in recent Lasernet versions. The above error can be resolved by upgrading to Lasernet 9.15 and 10.3.0.