SMTP2GO settings: mail.smtp2go.com, port 2525, 587 or 465
SMTP2GO relay settings: host mail.smtp2go.com, ports 2525/587/8025/25 STARTTLS or 465/8465 SSL, an SMTP user created in the dashboard. Free plan (1,000 emails/month, 200/day), pricing tiers and errors.
SMTP2GO outgoing mail server:
mail.smtp2go.com, port <code>2525</code> (STARTTLS) or <code>587</code> (STARTTLS) or <code>8025</code> (STARTTLS) or <code>25</code> (STARTTLS) or <code>465</code> (SSL/TLS) or <code>8465</code> (SSL/TLS), username = an SMTP user created in Sending → SMTP Users, password = the SMTP user's password.
SMTP2GO SMTP settings at a glance
| Outgoing (SMTP) host | mail.smtp2go.com (also mail-eu.smtp2go.com, mail-us.smtp2go.com for regional endpoints) |
|---|---|
| Ports & encryption |
2525 — STARTTLS <em>(recommended)</em>587 — STARTTLS8025 — STARTTLS25 — STARTTLS465 — SSL/TLS8465 — SSL/TLS |
| Username | an SMTP user created in Sending → SMTP Users |
| Password | the SMTP user's password |
| Authentication | SMTP users are separate from your dashboard login; create one per app. |
How to set up SMTP2GO SMTP
- Sending → Verified Senders → add your domain and the CNAMEs.
- Sending → SMTP Users → Add SMTP User.
- App settings: host mail.smtp2go.com, port 2525 (or 587), STARTTLS, username/password = SMTP user.
Sending limits
- Free plan: 1,000 emails per month with a 200-per-day cap and a 25 MB size limit; Starter plans from about $10/month for 10,000.
- Verified sender domains (CNAME-based DKIM/Return-Path) needed for full deliverability.
Things that catch people out
- Free accounts are reviewed manually and can be limited to verified senders only.
Common SMTP2GO SMTP errors
| Server reply | Meaning | Fix |
|---|---|---|
535 Authentication failed | Dashboard login used instead of an SMTP user. | Create an SMTP user. |
550 Your daily/monthly limit has been reached | Plan cap. | Upgrade or switch relay. |
More codes: 535 authentication failed, 550 relay denied, 554 rejected as spam, connection timed out — or all SMTP error codes.
When SMTP2GO 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 SMTP2GO nowRelated settings
SMTP2GO SMTP — questions
Host mail.smtp2go.com, port 2525, 587 or 8025 with STARTTLS (465/8465 with SSL), and an SMTP user created in the SMTP2GO dashboard.
Free for 1,000 emails a month (200/day); paid plans start around $10/month for 10,000 emails. For comparison, QueenSMTP is $5/year plus $0.10 per 1,000 emails.
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