Emails Bouncing When Including great-site.net Link — Reputation/Blocklist Issue?

[snlcnsltncy]

Website URL

all my domains that contains great-site.net

Error Message

550 AUP#SNDR - message rejected

Other Information

Hi, I’m using a free subdomains for my landing pages that I created using Landingi:
all containing the domain link hosted on InfinityFree.

When I send emails from my Bluehost email account via Webmail hosted by “Bluehost”, the emails are rejected with this error:

550 AUP#SNDR - message rejected

After testing, I confirmed:

• Emails without the domain URL send fine.

• The same link works when sent via Pipedrive CRM.

• But when sending via Bluehost SMTP, the email bounces immediately before delivery.

This makes me think that the free link or related subdomains may have a poor sender reputation or might be on a blocklist that some email providers (like Bluehost’s filtering via Cloudfilter) reference.

My question:

• Is the free domain known to have deliverability/reputation issues?

• Is there a way to improve the trust score or reputation of this subdomain when used in emails?

• Or would you recommend setting up a redirect via a custom domain instead?

I appreciate any insights or recommended workarounds from the community. Thanks in advance!

[Greenreader9]

You’ll have to ask Bluehost, they have more insight into their system then we do.

Also, please refrain from using AI, it makes it harder to understand what you are asking.

[Admin]

From what I can tell from that error message, I think it means that Bluehost is blocking your email from being sent. As for why they are doing that, we can only guess. If you want to know more: ask Bluehost. They are blocking your message, not us, so you’re really asking this question in the wrong place. We don’t do email at all, so we cannot help you with email issues.

Bluehost blocking links to our free subdomains is definitely a possibility. Free subdomains do suffer from noisy neighbor effects, and sometimes the entire domain name does get added to a blocklist. But I will stress again, that would Bluehost’s blocklist that contains our domain. And only Bluehost controls which domains are on that blocklist.