How to sign DKIM with a 2048 bit key in Mailjet?
Summary
What email marketers say11Marketer opinions
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.
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.
Email marketer from Quora explains that using a 2048-bit DKIM key provides stronger cryptographic protection against spoofing and tampering compared to shorter keys, improving email security.
Email marketer from SparkPost advises monitoring DKIM performance and reputation using feedback loops and reporting tools to identify and address any issues with email authentication or deliverability.
Marketer from Email Geeks mentions that 2048-bit public keys can be a pain to manage in DNS.
Marketer from Email Geeks states that 2048-bit keys are widely supported by DNS management tools. The issue is that they necessitate splitting the RR into two, and the web interfaces were initially slow to catch up.
Marketer from Email Geeks shares that there is no direct way to set up a 2048 bit DKIM in Mailjet, but their Support should be able to help.
Email marketer from SuperUser forum mentions that after updating the DNS record with the 2048-bit key, it can take some time for the changes to propagate across the internet. This can affect the validation of DKIM signatures.
Email marketer from Reddit suggests contacting Mailjet support directly to request a 2048-bit DKIM key. They typically handle the generation and setup process.
Email marketer from Email On Acid explains that while a 2048-bit key improves security, it doesn't directly guarantee better deliverability. Deliverability depends on many factors including sender reputation, engagement, and content quality.
Email marketer from MXToolbox suggests using online DKIM record verification tools to confirm that the 2048-bit DKIM key is correctly published in DNS and that the signature is valid.
What the experts say2Expert opinions
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.
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.
What the documentation says6Technical articles
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.
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.
Documentation from EasyDMARC specifies a DKIM record generator that can generate a 2048-bit key. This provides a more secure signature and makes the DKIM record unreadable to unauthorized users, preventing malicious attacks.
Documentation from Mailjet explains that periodic DKIM key rotation is recommended to maintain security. Mailjet's support team can assist with generating a new 2048-bit key and updating the DNS record.
Documentation from Cloudflare details maximum TXT record lengths. For DKIM records that need to be split, it's important to ensure each section is within the provider's size limits.
Documentation from RFC 6376 (DKIM Standard) specifies that implementations MUST support a minimum key size of 1024 bits, and SHOULD support 2048-bit keys or larger for improved security.