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Domains

A domain is the part of an email address after the @ sign (e.g. example.com). You must add and verify at least one domain before creating mailboxes.

Adding a Domain

  1. Go to Domains in the left sidebar.
  2. Click Add Domain.
  3. Enter the domain name (e.g. example.com) and click Add Domain.

If this is your first domain, it is automatically set as your primary domain. For additional domains, you can choose whether to make the new one primary or leave the existing primary unchanged.

The domain is added immediately, but it will not send or receive email until the required DNS records are in place.

DNS Records

After adding a domain, Vantage needs three DNS records configured at your domain registrar or DNS provider. Click Check DNS on the domain row at any time to see the current status and get the exact values to enter.

MX Record — Receiving Email

An MX (Mail Exchanger) record tells the internet where to deliver email for your domain.

First create an A record for your mail server:

mail.example.com.  IN  A  <server IP>

Then add the MX record at your domain root:

example.com.  IN  MX  10  mail.example.com.

SPF Record — Authorizing Outbound Email

An SPF (Sender Policy Framework) TXT record tells receiving mail servers which IP addresses are allowed to send email from your domain. Without SPF, outbound messages are more likely to land in recipients' spam folders.

Add a TXT record at your domain root:

v=spf1 ip4:<server IP> ~all

If you also send email from other services (e.g. a marketing platform or Google Workspace), include them in the same record:

v=spf1 ip4:<server IP> include:_spf.google.com ~all

DKIM Record — Signing Outbound Email

DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outbound email, proving it genuinely came from your domain. Vantage generates the key for you — click Check DNS to see the exact TXT record value.

Add a TXT record with this name:

mail._domainkey.example.com.

The value is a long string starting with v=DKIM1;. Use the Copy button in the DNS check panel to copy it exactly.

DNS propagation

DNS changes can take anywhere from a few minutes to 48 hours to propagate globally. Click Check DNS again after making changes to see if Vantage can detect them.

DNS Check Results

After clicking Check DNS, a results panel appears with the status of each record:

Badge Meaning
MX ✓ MX record found. The domain can receive email.
SPF ✓ SPF record found. Outbound mail is authorized.
DKIM ✓ DKIM record found and matches this server's key. Outbound mail is signed.

Any failing check shows the exact record you need to add or correct.

Primary Domain

Exactly one of your domains is the primary domain. The primary domain is used as the default when creating new mailboxes, and in some system notifications. To change which domain is primary, click Edit on any domain and check Set as primary domain.

Editing a Domain

Click Edit on any domain row to configure:

Field Description
Custom webmail URL A hostname users can visit to access webmail using just their username (e.g. mail.example.com). After saving, click Provision SSL to obtain a Let's Encrypt certificate for this hostname.
SMTP HELO hostname The hostname used in SMTP EHLO/HELO when Vantage sends outbound mail from this domain. Leave blank to use the platform default. Should match your server's reverse DNS (PTR) record for best deliverability.
Set as primary domain Make this the primary domain (clears the flag from the current primary).

Custom Webmail URL

By default, users access webmail at the Zylatech-hosted address. You can give each of your domains its own branded URL:

  1. Create a DNS A record pointing the desired hostname (e.g. mail.example.com) to your Vantage server's IP address.
  2. In Domains, click Edit on the domain and enter the hostname in the Custom webmail URL field. Click Save Changes.
  3. Click Provision SSL on the domain row. Vantage runs Let's Encrypt automatically and the URL becomes active within a few minutes.

Once SSL is provisioned, users navigating to https://mail.example.com will see the Vantage login page and can sign in using just their username (without @example.com).

Note

The DNS A record must already be pointing to the server before you click Provision SSL. If the A record is wrong or hasn't propagated, SSL provisioning will fail.

Deleting a Domain

Click Delete on the domain row and confirm. You cannot delete a domain that has active mailboxes — reassign or delete those mailboxes first.

Warning

Deleting a domain does not remove DNS records from your registrar. Do that separately if the domain will no longer send or receive Vantage email.