IONOS

Use this guide if your domain's DNS is at IONOS, including 1&1 and Strato domains whose nameservers end in ui-dns.com, ui-dns.de, ui-dns.org or ui-dns.biz. You add three TXT records and one MX record in the IONOS DNS settings.

The records to add

These names are for a domain added as acme.com. Notix shows each name in the short form, without your main domain on the end, so copy it from your domain page as it is. If you added a subdomain such as news.acme.com, the names read mail.news and notix._domainkey.news; _dmarc stays the same. The DKIM name and key are different for every domain. The MX value names the region your domain sends from, for example feedback-smtp.eu-west-1.amazonses.com, so copy it from your domain page too.

Add them at IONOS

1. 1

   Open the DNS settings

   Log in to IONOS and go to Domains & SSL. Next to your domain, click the gear symbol under Actions and select DNS.

2. 2

   Add each TXT record

   Click ADD RECORD and select TXT under Type.

   1. In HOST NAME, enter the name from the table, for example _dmarc.
   2. In VALUE, paste the value.
   3. Leave TTL as it is.
   4. Click SAVE.

   Repeat for the DKIM, SPF and DMARC records.

3. 3

   Add the MX record

   Click ADD RECORD and select MX.

   1. In HOST NAME, enter mail.
   2. In POINTS TO, paste the MX value, for example feedback-smtp.eu-west-1.amazonses.com.
   3. In PRIORITY, enter 10.
   4. Click SAVE.

Things to know at IONOS

• IONOS uses @ for your main domain. You do not need it here: every Notix record is on a name such as mail or _dmarc.
• Enter only the short name from the Notix table, such as mail. The IONOS examples use short names like www; we have not found an IONOS page that says outright that it adds your domain, so check the full name IONOS shows after you save.
• IONOS does not ask for quotation marks around TXT values. Paste the value as Notix shows it.

SPF and DMARC: check before you add

• SPF. A name can have only one SPF record. Notix puts its SPF on mail, not on your main domain, so it never clashes with the SPF your main domain may already have for your mailbox provider. Leave that one as it is. If mail itself already has a TXT record that starts with v=spf1, do not add a second one: edit it to include include:_spf.usenotix.dev.
• DMARC. A domain can have only one DMARC record. If _dmarc already has a record that starts with v=DMARC1, keep it and skip the Notix one. Notix accepts the record you have. Two DMARC records cancel each other out, and mailbox providers then ignore both.
• MX on `mail`. The MX record only takes bounce and complaint reports back to Notix. It does not touch the MX records on your main domain, so your normal inbox keeps working.

After you save

IONOS says changes are live at IONOS at once, and can take up to an hour to show everywhere else. Most records show in Notix within about 10 minutes.

You do not need to watch the page. Notix checks your records again on its own, and the domain turns Verified when the required records are found. To check straight away, open the domain in Domains and press Verify again. If a record is found at the wrong name, for example mail.acme.com.acme.com, the domain page says what to fix.

The records you add stay at your DNS host. Do not delete them later: Notix keeps checking them while you send.

Sources

We wrote this guide from the host's own help pages, checked on 21 October 2026. Labels can change; if your screen looks different, the host's page is the one to follow.

• IONOS: Managing TXT records
• IONOS: Editing MX records

For hosts not listed here, see Any other DNS host.