AUTH PLAIN, not AUTH LOGIN
Port 587 after STARTTLS. AUTH LOGIN fails.
PostShiba SMTP accepts AUTH PLAIN only. If your client is set to AUTH LOGIN, authentication fails, so switch it to PLAIN.
SMTP settings
| Setting | Value |
|---|---|
| Host | The SMTP host on your cluster page |
| Port | 587 |
| Encryption | STARTTLS |
| Authentication | AUTH PLAIN |
| Username | Your SMTP username, which starts with smtp_ |
| Password | The SMTP password shown once when the credential was issued |
Most libraries pick the method for you. If yours has a setting such as authentication, auth_type, or AuthMechanism, set it to plain.
Test from the command line
test-smtp.sh
1swaks --server smtp.postshiba.com:587 --tls \
2 --auth PLAIN --auth-user smtp_9 --auth-password YOUR_PASSWORD \
3 --from hello@mail.example.com --to you@example.com \
4 --header "Subject: PostShiba test" \
5 --body "hello from PostShiba"
The full walkthrough is on Send emails with SMTP.
HTTP inject uses the same credentials
HTTP inject takes the same SMTP username and password as HTTP Basic auth. See Send emails with HTTP.