How do I troubleshoot missing application emails?

Here’s a practical way to troubleshoot missing application emails (for example, candidates not receiving confirmations, alerts, or status updates).

1) Confirm the email was actually triggered

• Check the application workflow / automation logs.
• Verify the event happened that should send the email:
  • form submitted
  • application approved/rejected
  • interview scheduled
  • account created
• Look for failed jobs, retries, or queue backlogs.

2) Check the recipient address

• Make sure the email address on the application is correct.
• Watch for typos, extra spaces, missing @, or old addresses.
• Confirm the email wasn’t changed after submission.

3) Review spam, junk, and promotions folders

• Ask the recipient to check:
  • Spam/Junk
  • Promotions/Updates tabs
  • Quarantine folder if they use corporate email
• Have them search for:
  • your sender name
  • your sending domain
  • the subject line

4) Verify sender reputation and authentication

Missing emails are often caused by poor deliverability. Check:

• SPF is set up correctly
• DKIM is enabled and passing
• DMARC policy is valid
• Sending domain and “From” address match expected configuration

If these are broken, emails may be blocked or filtered.

5) Inspect bounce and delivery logs

• Look for:
  • hard bounces
  • soft bounces
  • blocked/rejected messages
  • deferred messages
• Common bounce reasons:
  • mailbox doesn’t exist
  • policy rejection
  • mailbox full
  • message content rejected

6) Check email service/provider limits

If you send through an email platform or SMTP service:

• Confirm your account isn’t suspended
• Check sending limits / rate limits
• Verify there are no API key issues
• Review service status pages for outages

7) Test with different email providers

Send test applications to:

• Gmail
• Outlook/Hotmail
• Yahoo
• a corporate domain

This helps determine whether the issue is universal or provider-specific.

8) Review message content

Some filters block emails based on content. Look for:

• spammy subject lines
• too many links
• suspicious attachments
• poor HTML formatting
• missing plain-text version
• misleading “From” names

9) Confirm template and routing logic

Make sure:

• the correct template is assigned
• the right audience/trigger is selected
• conditional logic isn’t skipping some users
• time zone or schedule settings aren’t delaying delivery

10) Check mail server or application logs

If you control the backend:

• inspect application logs for send errors
• inspect SMTP logs
• confirm DNS and mail server configuration
• test direct SMTP/API delivery from the app

11) Reproduce with a controlled test

Submit a test application using:

• a known valid email
• a clean inbox
• a simple message template

Then follow the message through logs to see where it stops.

12) Escalate to the email provider if needed

If everything looks correct on your side:

• open a support ticket with the provider
• include timestamps, recipient, subject, message ID, and bounce logs
• ask whether messages were accepted, deferred, or blocked

Quick checklist

• Correct recipient email
• Email workflow triggered
• No bounce/rejection
• SPF/DKIM/DMARC passing
• Inbox/spam checked
• Provider limits and outages checked
• Template and routing verified

If you want, I can also give you:

1. a step-by-step troubleshooting flowchart, or
2. a checklist for a specific platform like Gmail, Outlook, SendGrid, SES, or an ATS/app form.