# Add only a subdomain without TLD?

**URL:** <https://discourse.mailinabox.email/t/add-only-a-subdomain-without-tld/15966>\
**Category:** Help with Setup/Upgrade\
**Created:** [September 17, 2025, 1:42am UTC](https://discourse.mailinabox.email/t/add-only-a-subdomain-without-tld/15966 "2025-09-17T01:42:45Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![miaber](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/m/7c8e57/32.png) [@miaber](https://discourse.mailinabox.email/u/miaber)\
**Post date:** [September 17, 2025, 1:42am UTC](https://discourse.mailinabox.email/t/add-only-a-subdomain-without-tld/15966/1 "2025-09-17T01:42:46Z")

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Hi,

I think the answer is no, but could someone confirm for me if I can add only `@mail.example.com` to mail in a box while `@example.com`, its DNS records and nameserver is handled by another server elsewhere? I want to send emails using @mail.example.com

Thank you

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**Author:** ![stylnchris](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/stylnchris/32/2189_2.png) [@stylnchris](https://discourse.mailinabox.email/u/stylnchris)\
**Post date:** [September 17, 2025, 4:03am UTC](https://discourse.mailinabox.email/t/add-only-a-subdomain-without-tld/15966/2 "2025-09-17T04:03:19Z")

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Why not? You will need to setup your dns records externally for this to all happen and work but it should work fine.

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**Author:** ![miaber](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/m/7c8e57/32.png) [@miaber](https://discourse.mailinabox.email/u/miaber)\
**Post date:** [September 17, 2025, 4:28am UTC](https://discourse.mailinabox.email/t/add-only-a-subdomain-without-tld/15966/3 "2025-09-17T04:28:58Z")

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coz MIAB is complaining about nameservers which I don’t think can be set for subdomains.. maybe I should just copy all the MIAB DNS records into the external server

 ![image](https://discourse.mailinabox.email/uploads/default/original/2X/c/c26194e8f55bd6633d59d5f97032d6dcf0198e3e.png)

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**Author:** ![stylnchris](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/stylnchris/32/2189_2.png) [@stylnchris](https://discourse.mailinabox.email/u/stylnchris)\
**Post date:** [September 17, 2025, 10:05am UTC](https://discourse.mailinabox.email/t/add-only-a-subdomain-without-tld/15966/4 "2025-09-17T10:05:24Z")

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well, here is what I do and it works fine. my “box” has a “throw away domain” so example would be main box is [robertredford.com](http://robertredford.com) this can have both [mail.robertredford.com](http://mail.robertredford.com) and [robertredford.com](http://robertredford.com) now, I can add a sub domain like [test.example.com](http://test.example.com) to that server. I also dont use the dns of the box in either case. I change my dns records manually via whatever the domain lives (ie. godaddy, cloudflare, etc) there are a lot of entires you have to put in correctly. what helps is you go to “System” then “External DNS” and you copy those records manually of that page to your domain registrar. In some cases you can just down the zone file and modify it manually for what you want and upload it to your registrar but I would really do this manually.

I have may “subdomain” domains that I handle with the box though, it works completely fine.

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**Author:** ![system](https://discourse.mailinabox.email/uploads/default/original/2X/4/4d0933d13c456b7e57f296aa6cc344525b6f0c70.png) [@system](https://discourse.mailinabox.email/u/system)\
**Post date:** [September 24, 2025, 10:06am UTC](https://discourse.mailinabox.email/t/add-only-a-subdomain-without-tld/15966/5 "2025-09-24T10:06:07Z")

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