DKIM Configuration

DKIM (DomainKeys Identified Mail) is an email authentication method that helps verify that an email was actually sent from your domain and wasn't modified in transit. Setting up DKIM is highly recommended for improving email deliverability and security.

What is DKIM?

DKIM works by:

• Adding a digital signature to messages sent from your domain
• Publishing a public key in your DNS records that receiving mail servers can use to verify the signature
• Helping receiving mail servers distinguish legitimate emails from spoofed ones

Getting Your DKIM Key

Each domain hosted with MXroute has its own unique DKIM key. To access it:

1. Log into your MXroute control panel
2. Select the specific domain you want to configure
3. Navigate to the "DKIM Keys" section
4. Copy the entire DKIM key text displayed

Adding DKIM to Your DNS

Add the DKIM key as a TXT record in your domain's DNS settings:

Record Type	Host/Name	Value
TXT	x._domainkey	[your DKIM key text]

Important Notes About the Host/Name

• The exact format of the Host/Name field is: x._domainkey
• You MUST include both the underscore (_) and period (.) exactly as shown
• Some DNS providers may require you to enter just x if your domain is already specified elsewhere in their interface
• If in doubt, check with your DNS provider's documentation or support

Troubleshooting DKIM Configuration

Common Issues:

1. DNS Formatting Problems:

   • Some DNS providers may automatically add quotation marks around your value
   • If this happens, remove any duplicate quotation marks in the record
   • Watch for extra backslashes that may be inserted

2. Long TXT Record:

   • If your DNS provider has character limitations for TXT records
   • Use a DNS record splitter tool to break it into smaller chunks
   • Follow your DNS provider's specific instructions for long TXT records

3. Verification:

   • Allow 4-6 hours for DNS changes to propagate
   • Use an online DKIM verification tool to check your configuration

DKIM and Email Deliverability

Properly configured DKIM helps your emails:

• Pass spam filters more consistently
• Reach the inbox instead of the spam folder
• Build a positive sending reputation for your domain

DKIM works best when combined with proper SPF and DMARC records.