> ## Documentation Index
> Fetch the complete documentation index at: https://resend.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# IONOS
> Verify your domain on IONOS with Resend.
## Add Domain to Resend
First, log in to your [Resend Account](https://resend.com/login) and [add a domain](https://resend.com/domains).
It is [best practice to use a
subdomain](/knowledge-base/is-it-better-to-send-emails-from-a-subdomain-or-the-root-domain)
(updates.example.com) instead of the root domain (example.com). Using a
subdomain allows for proper reputation segmentation based on topics or purpose
(e.g. marketing) and is especially important if receiving emails with Resend.
## Log in to IONOS
Log in to your [IONOS account](https://my.ionos.com/domains):
1. Choose your Domain from the `Domain` list.
2. Select the `DNS` tab to get to the page to manage DNS records.
## Add MX SPF Record
Select “Add record” on IONOS to copy and paste the values MX from Resend.
1. On the `Add a DNS Record` page, select `MX`.
2. Type `send` for the `Name` of the record.
3. Copy the MX Value from Resend into the `Points to` field.
4. Use the default `Priority` of `10`.
5. Use the default TTL of `1 hour`.
6. Select `Save`.
Omit your domain from the record values in Resend when you paste. Instead of
`send.example.com`, paste only `send` (or `send.subdomain` if you're using a
subdomain).
Below is a mapping of the record fields from Resend to IONOS:
| IONOS | Resend | Example Value |
| --------- | -------- | --------------------------------------- |
| Type | Type | `MX Record` |
| Name | Name | `send` |
| Points to | Content | `feedback-smtp.us-east-1.amazonses.com` |
| TTL | TTL | `1 hour` |
| Priority | Priority | `10` |
Do not use the same priority for multiple records. If Priority `10` is already
in use on another record, try a higher value `20` or `30`.
## Add TXT SPF Record
In the same section, select “Add record” again.
1. On the `Add a DNS Record` page, select `TXT`.
2. Type `send` for the `Host name` of the record.
3. Copy the TXT Value Resend into the `TXT value` field.
4. Use the default TTL of `1 hour`.
5. Select `Save`.
Omit your domain from the record values in Resend when you paste. Instead of
`send.example.com`, paste only `send` (or `send.subdomain` if you're using a
subdomain).
Below is a mapping of the record fields from Resend to IONOS:
| IONOS | Resend | Example Value |
| --------- | ------- | ------------------------------------- |
| Type | Type | `TXT Record` |
| Host name | Name | `send` |
| TXT value | Content | `"v=spf1 include:amazonses.com ~all"` |
| TTL | - | `1 hour` |
## Add TXT DKIM Records
In the same section, select “Add record” again.
1. On the `Add a DNS Record` page, select `TXT`.
2. Type `resend._domainkey` for the `Host name` of the record.
3. Copy the record value from Resend into the `TXT value` field.
4. Use the default TTL of `1 hour`.
5. Select `Save`.
Omit your domain from the record values in Resend when you paste. Instead of
`resend._domainkey.example.com`, paste only `resend._domainkey` (or
`resend._domainkey.subdomain` if you're using a subdomain).
Below is a mapping of the record fields from Resend to IONOS:
| IONOS | Resend | Example Value |
| --------- | ------- | ---------------------------- |
| Type | Type | `TXT Record` |
| Host name | Name | `send` |
| TXT value | Content | `p=example_domain_key_value` |
| TTL | - | `1 hour` |
## Receiving Emails
If you want to receive emails at your domain, toggle the "Receiving" switch on the domain details page.
When you enable Inbound on a domain, Resend receives *all emails* sent to that
specific domain depending on the priority of the MX record. For this reason,
we strongly recommend verifying a subdomain (`subdomain.example.com`) instead
of the root domain (`example.com`). Learn more about [avoiding conflicts with
your existing MX
records](/knowledge-base/how-do-i-avoid-conflicting-with-my-mx-records).
Select “Add record” on IONOS:
1. On the `Add a DNS Record` page, select `MX`.
2. Type `inbound` (or whatever your subdomain is) for the `Name` of the record.
3. Copy the MX Value from Resend into the `Points to` field.
4. Use the default `Priority` of `10`.
5. Use the default TTL of `1 hour`.
6. Select `Save`.
Below is a mapping of the record fields from Resend to IONOS:
| IONOS | Resend | Example Value |
| --------- | -------- | -------------------------------------- |
| Type | Type | `MX Record` |
| Name | Name | `inbound` |
| Points to | Content | `inbound-smtp.us-east-1.amazonaws.com` |
| TTL | TTL | `1 hour` |
| Priority | Priority | `10` |
After verifying your domain, create a webhook to process incoming emails. For help setting up a webhook, how to access email data and attachments, forward emails, and more, see [our guide on receiving emails with Resend](/dashboard/receiving/introduction).
## Complete Verification
Now click [Verify DNS Records](https://resend.com/domains) on your Domain in Resend. It may take a few hours to complete the verification process (often much faster).
## Troubleshooting
If your domain is not successfully verified, these are some common troubleshooting methods.
Review the records you added to IONOS to rule out copy and paste errors.
[Review our guide on a domain not verifying](/knowledge-base/what-if-my-domain-is-not-verifying).