Summary
Implementing a 2048-bit DKIM key in Mailjet typically requires contacting their support for assistance, as there is no direct user interface option. While providing stronger cryptographic protection and being preferred for enhanced security, these keys demand careful DNS configuration due to the need for TXT record splitting. Older DNS systems might face limitations with longer TXT records. Mailjet documentation advises key rotation. RFC 6376 suggests supporting 2048-bit keys. Tools like EasyDMARC offer key generation. Experts recommend ensuring correct DNS syntax and proper DKIM alignment for DMARC. Cloudflare's TXT record length limits must be considered. Using DKIM with SPF and DMARC is essential, as is validating the record and monitoring DKIM performance. Remember, a 2048-bit key does not guarantee deliverability; sender reputation, engagement, and content quality matter.
Key findings
- Mailjet Support Required: Mailjet setup of 2048-bit DKIM usually requires their support team.
- Enhanced Security: 2048-bit keys offer greater cryptographic protection.
- Complex DNS: DNS configuration requires TXT record splitting and checking for provider support.
- No Deliverability Guarantee: Stronger DKIM keys do not guarantee email deliverability.
- DMARC alignment: Requires valid DKIM signature and proper alignment for enhanced deliverability
Key considerations
- Contact Mailjet Support: Contact Mailjet support to assist with set up of 2048 bit DKIM key
- Check DNS Provider Compatibility: Confirm your DNS provider supports split TXT records and maximum TXT record lengths.
- Validate Configuration: Use online tools to verify correct DNS record publication and signature validity.
- Implement Comprehensive Security: Use DKIM in conjunction with SPF and DMARC.
- Monitor DKIM Performance: Monitor DKIM performance and sender reputation to identify deliverability issues.
- Validate TXT record: Validate your TXT record after creating it.
What email marketers say
11 marketer opinions
Configuring a 2048-bit DKIM key in Mailjet involves contacting their support for setup, as there is no direct user interface option. While 2048-bit keys offer enhanced security against spoofing, they require careful DNS management, including splitting the TXT record into multiple parts. Support for split records and longer TXT record lengths is important. After setting up, verification via online tools and monitoring DKIM performance is crucial for ensuring deliverability and identifying potential issues. Note that a 2048-bit key alone doesn't guarantee better deliverability; sender reputation, engagement, and content quality remain critical factors.
Key opinions
- Mailjet Support: Mailjet's support is typically required to set up a 2048-bit DKIM key.
- Enhanced Security: 2048-bit DKIM keys provide stronger cryptographic protection against email spoofing and tampering.
- DNS Management Complexity: Implementing 2048-bit keys requires splitting the DNS TXT record, which necessitates careful configuration and DNS provider compatibility.
- No Deliverability Guarantee: A 2048-bit DKIM key alone doesn't ensure improved deliverability; other factors like sender reputation are essential.
Key considerations
- DNS Support: Verify that your DNS provider supports split TXT records and the necessary length for a 2048-bit DKIM key.
- Propagation Time: Allow sufficient time for DNS changes to propagate fully after updating the DKIM record.
- Verification: Use online DKIM verification tools to confirm that the key is correctly published and the signature is valid.
- Monitoring: Continuously monitor DKIM performance and sender reputation to identify and address any deliverability issues.
Marketer view
Email marketer from StackOverflow shares that some older DNS systems may have limitations with very long TXT records. Using a 2048-bit key requires splitting the DNS record, which might cause issues with systems that don't fully support it.
2 Feb 2022 - StackOverflow
Marketer view
Email marketer from EmailGeeks forum notes that 2048-bit DKIM keys need to be split into multiple TXT records in DNS. Most modern DNS providers support this, but it's essential to check your provider's documentation.
28 May 2025 - EmailGeeks Forum
What the experts say
2 expert opinions
Experts emphasize the importance of careful DNS configuration and record splitting when implementing 2048-bit DKIM keys due to the length of the TXT record. They also highlight the reliance of DMARC on DKIM for enhanced deliverability, with a 2048-bit key preferred for stronger authentication when supported.
Key opinions
- Secure but Complex: 2048-bit DKIM keys are more secure but require meticulous DNS configuration, including proper record splitting.
- DMARC Reliance: DMARC depends on valid DKIM signatures and alignment for enhanced deliverability.
- Stronger Authentication: Using a 2048-bit key is preferrable over 1024-bit for stronger authentication, when supported by your system.
Key considerations
- DNS Configuration: Ensure proper record splitting and syntax when configuring DNS for 2048-bit keys.
- DMARC Alignment: Verify DKIM alignment with DMARC policies to maximize deliverability benefits.
- TXT record validation: Validate you TXT record using a 3rd party tool.
Expert view
Expert from Word to the Wise, Laura Atkins, explains that while using a 2048-bit key is more secure, it may require more careful DNS configuration due to the length of the TXT record. Ensuring proper record splitting and syntax is vital for successful implementation.
16 May 2022 - Word to the Wise
Expert view
Expert from Spam Resource, Chris Roosenraad, explains that DMARC relies on DKIM passing, and that requires a valid DKIM signature and proper alignment for enhanced deliverability. Using a 2048-bit key, when supported, is preferrable over 1024-bit for stronger authentication.
24 Jun 2021 - Spam Resource
What the documentation says
6 technical articles
Implementing a 2048-bit DKIM key in Mailjet involves creating a DKIM record and adding it to your DNS records. Mailjet's support can assist with key generation. Key rotation is recommended for security. RFC 6376 advises support for 2048-bit keys. Cloudflare's TXT record length limits must be considered, and DKIM should be used with SPF and DMARC. EasyDMARC provides a tool to generate secure 2048-bit keys.
Key findings
- Mailjet Setup: Mailjet requires creating a DKIM record in DNS, with support available from their team for generation.
- Key Rotation: Regular DKIM key rotation enhances security.
- Security Standards: RFC 6376 recommends support for 2048-bit DKIM keys for improved security.
- Record Limits: DNS providers like Cloudflare have TXT record length limits to be aware of when implementing.
- Holistic Approach: Email authentication is best achieved by using DKIM, SPF, and DMARC together.
- Automated Tools: Tools like EasyDMARC's DKIM record generator facilitate creation of 2048-bit keys.
Key considerations
- DNS Configuration: Ensure correct TXT record creation and placement in DNS.
- Support Assistance: Leverage Mailjet's support for generating and implementing 2048-bit keys.
- Record Length Limits: Check and adhere to TXT record length limits imposed by your DNS provider.
- Comprehensive Security: Implement DKIM in conjunction with SPF and DMARC for maximum protection.
- Regular Maintenance: Adopt a schedule for periodic DKIM key rotation to maintain security.
Technical article
Documentation from Google emphasizes the importance of using DKIM, SPF, and DMARC together to enhance email security. Google also recommends using at least 2048-bit RSA keys for DKIM.
23 Sep 2022 - Google
Technical article
Documentation from Mailjet explains that to authenticate your domain with DKIM in Mailjet, you will need to create a DKIM record (a TXT record) and then add this information to your DNS records.
15 Aug 2021 - Mailjet
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