turboSMTP settings: pro.turbo-smtp.com, port 587 or 465
turboSMTP relay: host pro.turbo-smtp.com, ports 25/587/2525 STARTTLS or 465 SSL, username = account email, password = account/SMTP password. Free trial allowance, plans and setup.
turboSMTP outgoing mail server:
pro.turbo-smtp.com, port <code>587</code> (STARTTLS) or <code>2525</code> (STARTTLS) or <code>25</code> (STARTTLS) or <code>465</code> (SSL/TLS), username = your turboSMTP account email (or an additional SMTP user), password = your turboSMTP password.
turboSMTP SMTP settings at a glance
| Outgoing (SMTP) host | pro.turbo-smtp.com |
|---|---|
| Ports & encryption |
587 — STARTTLS <em>(recommended)</em>2525 — STARTTLS25 — STARTTLS465 — SSL/TLS |
| Username | your turboSMTP account email (or an additional SMTP user) |
| Password | your turboSMTP password |
| Authentication | Sender addresses must be authorised in the dashboard before they are accepted. |
How to set up turboSMTP SMTP
- Dashboard → Authorized senders → add your address/domain and set SPF/DKIM.
- App settings: host pro.turbo-smtp.com, port 587, STARTTLS, username = account email, password = password.
Sending limits
- Free trial of around 6,000 emails per month (200/day) for new accounts; paid plans from about $15/month.
- Dedicated IPs available on higher plans.
Things that catch people out
- Unauthorised From addresses are rejected silently in some clients — check the dashboard log.
Common turboSMTP SMTP errors
| Server reply | Meaning | Fix |
|---|---|---|
550 Sender not authorized | From address not added. | Authorise the sender. |
More codes: 535 authentication failed, 550 relay denied, 554 rejected as spam, connection timed out — or all SMTP error codes.
When turboSMTP is not enough for your app
When a provider caps you or blocks a port, point the same app at QueenSMTP instead: host smtp.queensmtp.com, port 587 (STARTTLS) or 465 (SSL), your SMTP username and password from the dashboard. $5/year plus $0.10 per 1,000 emails, 100 free a day to test.
Get SMTP credentials — free to test Test turboSMTP nowRelated settings
turboSMTP SMTP — questions
pro.turbo-smtp.com on port 587 (STARTTLS), 465 (SSL), 25 or 2525, with your account email and password.
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