Campaign emails are scored by a spam filter before they leave Fuzegenai. If a message scores too high it is not sent, and that step is not delivered to that lead.
What the check does
Just before a campaign email is handed to your mailbox provider, the fully rendered message — subject, body, links, headers and merged personalisation — is scored by rspamd, the same open-source filter that sits in front of many receiving mail servers. The result is a number. Lower is better.
- Under 2.0: the email is sent.
- 2.0 or above: the email is not sent.
The score is taken once, before any send retries, so the same message will not go out on a second attempt. If the scoring service itself cannot be reached, campaign email is refused rather than sent unchecked.
The free spam checker runs a draft through the same kind of scoring without an account, so you can test copy before it goes into a step.
Warmup mail is scored on a more forgiving scale, and a warmup message that scores badly is skipped instead of sent. It does not affect your campaigns.
What happens to a blocked email
The queued email is marked failed and never reaches the provider. The daily cap claim on that mailbox and the monthly allowance reservation are both released, so a blocked send does not use up your volume.
There is no per-email spam score in the dashboard today and no "send anyway" control, so a blocked send is quiet. If a campaign is producing fewer sends than you expect and everything in Why is my campaign not sending? checks out, the content of the step is the likely cause.
What pushes the score up
The filter groups its findings into a handful of areas. In practice the ones that move a cold email over the line are:
- Authentication. SPF, DKIM or DMARC not lining up with the From address.
- Links and URLs. Link shorteners, redirect domains, a domain with poor reputation, or many links in a short message.
- Sending domain and IP reputation. A young or previously abused domain.
- Message structure. Broken or unusual MIME, image-only bodies, heavy HTML wrapped around two lines of text.
- Content. Classic spam phrasing, shouting capitals, stacked punctuation, large attachments.
How to get a step sending again
- Fix authentication first — see Set up SPF, DKIM, and DMARC for your domain. It is the single biggest score component you control.
- Cut the step back to plain, short text. One link is usually enough; zero is better on a first touch.
- Use links on your own domain rather than shorteners or redirect services.
- Remove attachments and heavy HTML wrappers.
- Save the step. The next email queued for it is scored fresh, so a fixed step starts sending without any other action.
If you have rewritten a step and it still will not send, send the campaign name and step number to priority@fuzegenai.com and we can look at the score for you.