# Issue with SendGrid Webhook Callback in Mautic 5: DSN Configuration for Event Processing / "Transport Not Found" Error – Does Mautic 5 Support This by Default or Is a Plugin Required?

**URL:** <https://forum.mautic.org/t/issue-with-sendgrid-webhook-callback-in-mautic-5-dsn-configuration-for-event-processing-transport-not-found-error-does-mautic-5-support-this-by-default-or-is-a-plugin-required/34939>\
**Category:** Mautic 5 Install/Upgrade Support\
**Tags:** community, development, email\
**Created:** [February 5, 2025, 10:57am UTC](https://forum.mautic.org/t/issue-with-sendgrid-webhook-callback-in-mautic-5-dsn-configuration-for-event-processing-transport-not-found-error-does-mautic-5-support-this-by-default-or-is-a-plugin-required/34939 "2025-02-05T10:57:12Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![alexzlobin](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/alexzlobin/32/13606_2.png) [@alexzlobin](https://forum.mautic.org/u/alexzlobin)\
**Post date:** [February 24, 2026, 2:55pm UTC](https://forum.mautic.org/t/issue-with-sendgrid-webhook-callback-in-mautic-5-dsn-configuration-for-event-processing-transport-not-found-error-does-mautic-5-support-this-by-default-or-is-a-plugin-required/34939/4 "2026-02-24T14:55:33Z")

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Hi everyone

I’ve built a new plugin inspired by (and based on the approach of) the Amazon SNS callback plugin by **@matbcvo** :

Reference project: matbcvo/mautic-amazon-sns-callback

My plugin repository: AlexanderZlobinM1/SendgridCallBackBundle

I’d really appreciate it if you could install it, test it in your environment, and share any feedback — bugs, logs, edge cases, and feature requests are all welcome

Thanks in advance!

> **[GitHub - AlexanderZlobinM1/SendgridCallBackBundle](https://github.com/AlexanderZlobinM1/SendgridCallBackBundle)**
>
> Contribute to AlexanderZlobinM1/SendgridCallBackBundle development by creating an account on GitHub.

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