# Issue with mailcow and forum

**URL:** https://meta.discourse.org/t/issue-with-mailcow-and-forum/402380
**Category:** Support
**Created:** [May 7, 2026, 11:18am UTC](https://meta.discourse.org/t/issue-with-mailcow-and-forum/402380 "2026-05-07T11:18:14Z")
**Posts on this page:** 1
**Showing post:** 7

<div class="post-metadata">

### Author: ![tobiaseigen](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tobiaseigen/32/539204_2.png) [@tobiaseigen](https://meta.discourse.org/u/tobiaseigen)
#### Post date: [May 7, 2026, 2:27pm UTC](https://meta.discourse.org/t/issue-with-mailcow-and-forum/402380/7 "2026-05-07T14:27:37Z")

</div>

Hey thanks for reporting this @ice.d! I just had another look myself and after clearing the cache on my phone and turning off wifi, I saw the same mailcow login!

With some help from AI, I learned that because my server has IPv6 my reverse proxy config has to listen for IPv6 as well as IPv4. Apparently mobile networks prefer IPv6.

```plaintext
server {
    listen 80;
    listen [::]:80; # ← add this
    server_name discourse.tobiaseigen.org;
    ...
}

server {
    listen 443 ssl;
    listen [::]:443 ssl; # ← add this
    server_name discourse.tobiaseigen.org;
    ...
}

```

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