Why a Campaign Was Flagged or Blocked

Every campaign is checked before it goes out. The check protects the shared sending reputation that everyone on the platform depends on — if spam leaves the system, deliverability suffers for every sender, not just the one who sent it.

Most campaigns pass without you noticing. When one doesn't, here's what happened and what to do.

What the checks look for

Your content is scored across several categories:

Spam — the patterns of unsolicited bulk mail
Phishing — impersonating a brand or trying to harvest credentials
Toxicity — abusive or harassing language
Violence
Adult content
Prohibited content — categories that can't be sent through the platform at all

Links are scanned separately, with particular attention to URLs mimicking well-known brands — a common phishing signal.

Why a legitimate campaign gets flagged

It happens, and it's usually one of these:

Spam-shaped writing. ALL CAPS subject lines, rows of exclamation marks, "ACT NOW", "100% FREE", "GUARANTEED" — the vocabulary of bulk spam, even in honest mail.
Link shorteners or unfamiliar domains. Shorteners hide the destination, which is exactly what phishing does. Link to your own domain where you can.
Brand names in links. A URL that looks like it's imitating a known brand scores as phishing even when you're legitimately referring to that brand.
Very short content. A campaign with almost no text gives the checks little to judge, which makes a confident verdict harder.

The phishing check is the most prone to false positives. It's trained on phishing email, and it can over-fire on ordinary content that happens to share surface features. If your campaign was flagged for phishing alone and you can't see why, that's the likely explanation.

What the block tells you

When a campaign is blocked you're shown which category tripped it, not just that something did. Read that first — it usually points straight at the fix. A spam flag means rewriting copy; a phishing flag usually means a link.

Getting it sent

Read the reason. The category named in the block is the fastest route to the cause.
Rewrite the obvious triggers. Drop the ALL CAPS, cut exclamation marks, and replace urgency-spam phrasing with plain description.
Check every link. Replace shorteners with full URLs, and prefer your own domain.
Add real content if the campaign is very short.
Send a test to yourself and re-run the check before sending to the list.

Don't try to slip content past the checks by disguising words — spacing letters out, swapping characters for lookalikes, or splitting phrases. Evasion patterns are themselves a spam signal, and repeated attempts put your account at risk of review.

If your content genuinely needs to say something the checks object to, talk to support rather than working around them. A false positive is a bug worth reporting; a workaround is a much bigger problem for you later.

Still stuck?

If you're confident the campaign is legitimate and it still won't send, contact support with the campaign name and the reason shown. False positives do happen, and reporting them is how the checks get better.

Quick answers

Why was my campaign blocked? It scored high in one of the content check categories — spam, phishing, toxicity, violence, adult or prohibited content. The block names which one.

Can I see why? Yes. The block message shows the category that tripped it.

I'm not sending spam. Why was it flagged? Usually spam-shaped writing (caps, exclamation marks, urgency phrases), link shorteners, or a URL resembling a known brand. Phishing in particular can over-fire on legitimate mail.

Can I turn the checks off? No. Sensitivity is a platform setting, not an account one, because it protects deliverability for every sender.

What if it's genuinely a false positive? Contact support with the campaign name and the reason shown. That's worth reporting rather than working around.

Why Was My Campaign Flagged or Blocked?