Docs Sending & SMTP

Sending & SMTP

Verify deliverability after setup

Updated: May 13, 2026 Read time: 3 min
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A green Success toast on the test send only means the provider accepted the message. Whether it lands in the inbox or in spam is what this step verifies.

Send a test mail to multiple addresses

  1. Open FreddyMail > SMTP Setup and click Send test mail.
  2. Send to at least three addresses in sequence: a Gmail account, an Outlook account, and your own domain address.
  3. In each inbox, verify whether the message arrives in the inbox or in spam.

Read the headers

In the receiving client, display the original headers (Gmail: Show original, Outlook: View source). Three lines matter:

  • Authentication-Results: spf=pass — SPF is good.
  • dkim=pass — the DKIM signature is valid.
  • dmarc=pass — DMARC policy is satisfied.

If any of those say fail, your provider’s setup area (SendGrid, Mailgun, …) helps you correct the DNS values.

Check the FreddyMail log entry

FreddyMail Logs tab with delivery history
Logs tab. Each entry shows timestamp, recipient, email type and status.

Open FreddyMail > Logs and find the test mail. Three columns give you the most important signals:

  • Status — Success (provider accepted) or Error (provider rejected).
  • Recipient — does it match the test recipient?
  • Provider response — on errors this often spells out the cause (for example 550-5.7.1 SPF fail).
Successful log entry with status indicator Annotated
Successful log entry with status `Sent`. The provider message ID and round-trip time live inside the SMTP response line.

When mail lands in spam

Useful second-opinion tools: