# Microsoft bouncing all emails from our self-hosted Discourse site (via Mailgun)

**URL:** https://meta.discourse.org/t/microsoft-bouncing-all-emails-from-our-self-hosted-discourse-site-via-mailgun/371739
**Category:** Support
**Tags:** email
**Created:** [June 26, 2025, 2:12am UTC](https://meta.discourse.org/t/microsoft-bouncing-all-emails-from-our-self-hosted-discourse-site-via-mailgun/371739 "2025-06-26T02:12:38Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![agungor](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/agungor/32/260344_2.png) [@agungor](https://meta.discourse.org/u/agungor)
#### Post date: [June 28, 2025, 8:42pm UTC](https://meta.discourse.org/t/microsoft-bouncing-all-emails-from-our-self-hosted-discourse-site-via-mailgun/371739/8 "2025-06-28T20:42:29Z")

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> [@nathank](#):
>
> 4.7.650 The mail server [.27] has been temporarily rate limited due to IP reputation

The line above is essentially saying that there is a reason for the throttling (beyond just receiving a large number of emails), and that is IP reputation. You can find your sending IP from emails Mailgun sends out on your behalf, and check your sending IP reputation (you can find some suggestions [here](https://www.twilio.com/en-us/blog/insights/5-ways-check-sending-reputation)).

If you find that the reputation of your sending IP is poor, you can ask Mailgun to move you to another server.

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_[View the full topic](https://meta.discourse.org/t/microsoft-bouncing-all-emails-from-our-self-hosted-discourse-site-via-mailgun/371739)._