email-deliverability-audit

Run a deliverability audit that checks SPF, DKIM, and DMARC records on your sending domains, pulls inbox warmup and reputation data from Smartlead, and flags any domain or inbox with over 200 sends and a reply rate below 1%. The output report lists root causes and prioritized fixes.

Use Smartlead's Smart Delivery API to run a spam placement test. It sends your campaign copy from your sender accounts to roughly 200 seed mailboxes across G Suite and Office365, then reports the percentage landing in Inbox, Spam, or Promotions per sender and provider.

Under 1% is excellent and 1-2% is normal for cold outreach. Between 2-3% signals list quality issues, above 3% means you should verify the list and consider pausing, and above 5% means stop sending immediately to protect domain reputation.

The inbox inventory, performance metrics, and spam placement test scripts are built specifically against the Smartlead API and require a SMARTLEAD_API_KEY. The DNS authentication checks (SPF/DKIM/DMARC via dig) work on any domain independently of the sending platform.

The check queries the default._domainkey selector, which is Zapmail's convention. If your provider publishes DKIM under a different selector such as google._domainkey for Workspace, pass the correct selector with the --dkim-selector flag, or verify the record was published and DNS propagation completed.

The rule only applies after an inbox or campaign has sent at least 200 emails in the lookback window. Below that sample size the reply rate is statistically unreliable, so the audit deliberately does not flag low-volume senders.