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An independent reviewer blocked two of the five outbound emails I submitted, and I agree with both decisions. The problems were small, but the available account does not identify the reviewer, the messages, or the reasons for either block. Without those review notes, it would be misleading to invent what went wrong. The key first step is to establish what “blocked” means: a reviewer can reject copy before it is sent, while a receiving mail provider can reject a message during delivery. Those are different problems with different fixes.
What does “blocked” mean in this review?
A copy reviewer’s decision is an editorial or policy judgment about a message. A mail provider’s rejection is a delivery event, typically recorded in a bounce or SMTP response. One does not prove the other. The two emails in this account were blocked by an independent reviewer; that fact alone does not establish that Gmail, Yahoo, or another provider rejected them, or that they landed in spam.
To explain why the reviewer was right, the account needs the reviewer’s actual notes and the relevant message text or headers. Until those are available, the causes of the two decisions remain unknown. Small defects can matter when they alter sender identity, make a subject inaccurate, break message formatting, affect authentication, or interfere with opting out—but none of those is established as the cause here.
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Why might a small email error matter?
“Tiny” describes the size of a change, not its consequence. A short discrepancy can affect what a recipient understands, whether a sender is identifiable, or whether a message meets a policy or technical requirement. The applicable check depends on the kind of review:
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- Editorial review: Compare the reviewer’s stated reason with the exact wording, From line, subject, and message content. Correct only what the note supports.
- Legal review: Check the rules that apply to the message’s purpose and the recipient’s jurisdiction; legal obligations are not interchangeable with a reviewer’s house style.
- Delivery diagnosis: Look for a delivery status, bounce reason, rejection code, or authenticated message headers. A copy reviewer’s block is not a provider error code.
Why are my emails being rejected?
If a receiving provider rejected an email, start with the provider’s response and the message’s authentication and transport details. Do not infer rejection from a low open rate: Google says open rates are not necessarily an accurate indicator of deliverability or spam classification. A reviewer’s refusal to approve copy does not answer this delivery question.
Gmail sender requirements
Google’s Gmail sender guidelines say all senders to Gmail accounts must use SPF or DKIM authentication, maintain valid forward and reverse DNS, use TLS, and meet message-format requirements. Google also says spam rates in Postmaster Tools should remain below 0.3%.
For senders sending more than 5,000 messages per day to Gmail accounts, Google lists additional requirements, including both SPF and DKIM, DMARC, alignment of the visible From domain with SPF or DKIM, and one-click unsubscribe for marketing and subscribed messages. Google says an enforcement ramp-up for noncompliant traffic began in November 2025. Requirements and enforcement can change, so consult Google’s Gmail sender FAQ as well as the guidelines for the current details. These are Gmail delivery rules; they do not establish what the independent reviewer applied to these five emails.
Yahoo delivery requirements
Yahoo publishes its own Sender Best Practices, including DMARC and alignment expectations. Do not assume its thresholds or enforcement are identical to Gmail’s. Check the relevant provider’s current guidance when diagnosing an actual delivery failure.
What U.S. law requires for commercial email
For messages subject to U.S. law, the FTC says CAN-SPAM applies to commercial email, including business-to-business messages. Its CAN-SPAM compliance guide summarizes requirements that include accurate header information, a non-deceptive subject line, required advertisement identification, a valid physical postal address, a clear opt-out method, prompt handling of opt-out requests, and oversight of vendors sending email on a company’s behalf. Whether an email is commercial or transactional depends on its primary purpose.
Advertisement identification does not have to appear in the subject line under CAN-SPAM. FTC attorney Christopher Brown put it this way: “The CAN-SPAM Act doesn’t require senders to identify the message as an advertisement in the subject line.” His FTC interview also cautions that deceptive subject lines are illegal and opt-out requests must be honored promptly.
How do I check if my email is blocked?
Use evidence from the stage where the problem occurred. An approval decision, a provider rejection, and a spam-folder placement are not the same outcome.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errors- Reviewer block: Get the reviewer’s specific note and identify the exact text or element it refers to.
- Provider rejection: Check the sending platform’s delivery log or bounce report for the recipient, timestamp, and rejection response. If available, inspect authenticated message headers.
- Possible spam placement: Use provider delivery signals and relevant monitoring tools rather than treating opens as proof. Google Postmaster Tools is Google’s monitoring option for Gmail-related sender data.
A useful check before sending
Separate copy approval from mail transport checks; passing one does not guarantee the other.
- Confirm identity: Check that the From line accurately identifies the sender and that it matches the intended sending domain.
- Read subject and message together: Ensure the subject is accurate and the body delivers what it promises; correct any mismatch identified by a reviewer.
- Check applicable commercial-email obligations: For U.S. commercial messages, verify the required address and opt-out elements and make sure opt-outs are honored.
- Check delivery setup when diagnosing transport: Review the relevant provider’s current authentication, DNS, TLS, formatting, and unsubscribe requirements, then use logs or provider tools to investigate rejection.
If comparing the two blocked emails with the three that passed, use the reviewer’s stated reasons, the exact text or header differences, and the applicable editorial, legal, or technical rule. The five-message outcome is a single review anecdote, not evidence of a general block rate.
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