Does using a different domain for CDN hosted images in emails affect deliverability?

Email marketer from Reddit mentions that using a CDN with a clean reputation is important. If the CDN domain is blacklisted, it will negatively impact deliverability, regardless of whether it's your sending domain.

Email marketer from Email Geeks explains that image domain can have some reputation associated with it, and spam delivery can result from a bad reputation image domain. But there shouldn't be impact from simply using images hosted at a different domain, as long as that different domain does not have reputation problems.

Email marketer from Litmus shares that image hosting domain reputation matters. If the domain serving your images has a poor reputation, it can impact your email deliverability, even if your sending domain is clean.

Email marketer from Stack Overflow recommends configuring your CDN to use a subdomain of your main domain (e.g., cdn.example.com). This helps to align the CDN with your brand and can improve trust with email providers.

Email marketer from EmailToolTester explains that using a CDN adds an extra layer of security. This increased security can indirectly boost deliverability by protecting your brand's online presence and credibility.

Email marketer from Quora explains that the reputation of the domain serving the images matters. If the domain hosting the images has a bad reputation, it could impact deliverability even if the sending domain has a good reputation.

Email marketer from Mailjet shares that using a CDN in itself is not a direct factor in deliverability. Other factors like sender reputation, authentication, and content play a more important role.

Email marketer from StackExchange answers that the most important thing is that the CDN being used has a good reputation. If the CDN domain is blacklisted, it will negatively impact deliverability.

Marketer from Email Geeks shares that the only issue would be using a domain you don’t control, like `*.<http://s3.amazonaws.com|s3.amazonaws.com>`.

Email marketer from Email on Acid shares that optimizing images is key. Using correctly sized and optimized images hosted on a CDN ensures faster loading times, which indirectly contributes to better engagement metrics and deliverability.

Email marketer from NeilPatel.com shares that using a CDN improves website speed, which indirectly benefits email deliverability. A faster website contributes to a better overall user experience and sender reputation.

Marketer from Email Geeks shares that they host on AWS but it’s mapped to their email sending domain `e.company.com`.

Expert from Email Geeks explains that uploading 9k images to Marketing cloud shouldn’t be necessary if you are using a CDN serving all those same images to your website, one would hope the reputation is pretty solid.

Expert from Email Geeks explains that the image domain shouldn’t have any impact on email deliverability.

Expert from Word to the Wise explains that while using a CDN with a different domain for images is common, the reputation of that image hosting domain can impact deliverability. It's important to ensure the CDN's domain isn't blacklisted or associated with spam.

Expert from Email Geeks explains that as long as your company domain reputation is good, it shouldn’t be a concern, and that using unwrapped `bit.ly` links can cause problems.

Expert from Spam Resource emphasizes that all domains linked in an email, including those hosting images on a CDN, contribute to the overall perception of the sender. A poor reputation for any linked domain can negatively influence deliverability.

Expert from Email Geeks shares that when they hosted on a CDN (Akamai), it was mapped to their subdomain `images.company.com`.

Documentation from Microsoft highlights the importance of maintaining a good domain reputation. This applies to all domains associated with your email campaigns, including those hosting images.

Documentation from SendGrid explains that domain reputation is key. Whether it's your sending domain or the domain hosting your images, a positive reputation is crucial for avoiding spam filters.

Documentation from Cloudflare explains that CDNs enhance security. Using a CDN to host images can help protect your primary domain from direct attacks, which may indirectly improve email deliverability by protecting your brand's reputation.

Documentation from Amazon AWS explains that using a separate domain for your CDN (like Amazon CloudFront) is a common and recommended practice. It does not inherently negatively impact email deliverability as long as the CDN domain has a good reputation.