How should I combine SPF records and what domain should I use with SendinBlue?

When configuring SPF records for SendinBlue, it's crucial to prioritize email deliverability by adhering to established best practices. Using a subdomain for SendinBlue is highly recommended to isolate your primary domain's reputation and protect it from potential deliverability issues. Avoid multiple SPF records; consolidate all authorized sending sources, including SendinBlue and Google Workspace, into a single SPF record using 'include:' mechanisms. Be mindful of SPF record limitations: stay within the 255-character limit and adhere to the 10 DNS lookup limit. Proper syntax is essential to prevent evaluation errors. Understand that SPF authenticates the envelope from/return path/bounce domain, not the domain visible in the email client. The MX mechanism can often be dropped as unnecessary. If near the DNS lookup limit, consider SPF flattening. Ensure a valid SPF record exists to prevent emails from being flagged as spam or rejected.

When configuring SPF records for SendinBlue, it's crucial to avoid common pitfalls and adhere to best practices to ensure optimal email deliverability. A key recommendation is to use a subdomain instead of your primary domain for sending emails via SendinBlue. This isolates your primary domain's reputation and protects it from potential deliverability issues arising from marketing campaigns. Multiple SPF records for a single domain are invalid; instead, consolidate all authorized sending sources, including SendinBlue, into a single SPF record using 'include:' mechanisms. Ensure your SPF record remains under the 255-character limit and adheres to the 10 DNS lookup limit to prevent authentication failures. Prioritize accurate syntax and proper SPF record formatting to avoid common setup errors.

When configuring SPF records, particularly in conjunction with SendinBlue or other ESPs, it's critical to use a subdomain rather than your bare domain to isolate reputation and prevent deliverability issues. You must ensure all sending sources are included in a single SPF record using 'include:' mechanisms instead of creating multiple SPF records. Additionally, remember that SPF authenticates the envelope from/return path/bounce domain, not the domain visible in the mail client, and the MX mechanism can often be dropped as unnecessary.

To ensure optimal email deliverability, you must authenticate your domain with SPF and DKIM records as instructed by SendinBlue. Your SPF record should include all authorized sending sources, including third-party email marketing platforms. Be mindful of the 10 DNS lookup limit for SPF records; exceeding this limit can cause authentication failures, and flattening your SPF record might be necessary. You can add or update your SPF record through your domain settings, following specific syntax guidelines to incorporate services like Google Workspace.