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Prerequisites

Before you begin, make sure you have:
  1. A SendKit account with a domain added
  2. Access to your IONOS account
  3. Your domain’s DNS records from the SendKit domain detail page

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Add DNS records

Log in to IONOS, go to Domains & SSL, click your domain, then select DNS. Click Add Record for each of the following.

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1. DKIM record

1

Add a new record

Click Add Record and select TXT as the record type.
2

Set the hostname

In the Hostname field, enter sendkit._domainkey.
3

Set the value

In the Value field, paste the full DKIM value from your SendKit domain detail page.
4

Save

Click Save.

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2. SPF record

1

Add a new record

Click Add Record and select TXT as the record type.
2

Set the hostname

In the Hostname field, enter send.
3

Set the value

In the Value field, paste the SPF value from your SendKit domain detail page.
4

Save

Click Save.

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3. MX record

1

Add a new record

Click Add Record and select MX as the record type.
2

Set the hostname

In the Hostname field, enter send.
3

Set the mail server

In the Points to field, paste the MX value from your SendKit domain detail page.
4

Set priority

Set Priority to 10.
5

Save

Click Save.

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4. DMARC record (optional)

1

Add a new record

Click Add Record and select TXT as the record type.
2

Set the hostname

In the Hostname field, enter _dmarc.
3

Set the value

In the Value field, enter v=DMARC1; p=none;.
4

Save

Click Save.

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Verify your domain

Go back to your SendKit domain detail page and click Refresh. IONOS DNS changes typically propagate within a few minutes.
If verification doesn’t succeed immediately, wait a few minutes and try again. SendKit also checks automatically in the background.

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Troubleshooting

Make sure you’re in the DNS section, not the Mail section. IONOS has separate sections for mail configuration and raw DNS records.
The SendKit MX record goes on the send subdomain, not your root domain. It won’t conflict with IONOS email or any existing MX records on your main domain.