Should transactional emails have separate authentication from bulk emails?

Email marketer from EmailProviderFeedback shares that it is best practice for authentication to setup your transactional emails with a third party to keep them seperate.

Email marketer from StackExchange shares that using a separate subdomain for transactional email is best practice for deliverability.

Marketer from Email Geeks recommends a different sending domain for transactional emails, as long as they share the same organizational domain.

Marketer from Email Geeks recommends separate authentication for transactional emails regardless of volume, and potentially a separate IP depending on the risks. Verification emails are often the first to be abused.

Marketer from Email Geeks recommends separate subdomains for authentication, but wouldn't change a working setup.

Marketer from Email Geeks says If the email setup isn't broken, don't fix it.

Email marketer from Mailjet explains that separating transactional and marketing emails improves deliverability and reputation. Transactional emails should be sent from a dedicated IP address or subdomain.

Marketer from Email Geeks likes separate DKIM domains for bulk and transactional emails as a minimum.

Email marketer from SendPulse shares that using a dedicated IP address for transactional emails can improve deliverability, as it isolates the sender's reputation from bulk email campaigns.

Email marketer from Reddit shares that separating transactional and marketing emails is vital as they are very different types of emails and that their reputations should be seperated.

Email marketer from Gmass explains that separating transactional and marketing emails and lists increases deliverability.

Email marketer from Forumer shares that having separate SPF records allows you to have seperate authentication to increase deliverability and avoid SPF limits.

Expert from Word to the Wise emphasizes the importance of sender reputation for different email streams. Separating transactional and marketing emails ensures that issues with one stream do not negatively impact the deliverability of the other.

Expert from Spam Resource explains that separating authentication (SPF, DKIM, DMARC) for transactional and bulk emails is a best practice. This helps maintain distinct reputations for each type of email, improving deliverability.

Documentation from Microsoft explains that configuring Sender ID, SPF, DKIM, and DMARC records differently for transactional and bulk email domains helps improve email authentication and filtering.

Documentation from SparkPost explains that using a separate sending domain for transactional and marketing emails allows for better control over sender reputation and deliverability.

Documentation from RFC explains that using separate domains or subdomains for transactional and bulk emails allows for the creation of distinct SPF records, enhancing authentication and deliverability.