Drop-in SMTP relay for Fluent Forms — conditional logic emails, multi-step forms, payment receipts, Conversational Forms. Non-blocking HTTP relay so form submission stays fast. SPF + DKIM on every message.
Free tier: 100 routed emails / month · works with Fluent Forms Pro · all 5 reliability layers included.
Fluent Forms · routed emails
Live[Fluent Form] Contact form submission
to admin@brammelle.co
Thanks — we received your enquiry
to sarah.m@gmail.com
High-value lead routed (>5 employees)
to enterprise@bramble-digital.com
Payment receipt — Order #2031 ($89)
to lucas.w@gmail.com
[Conversational] Pricing quote request
to jenny@maplecreek.co
Welcome to our newsletter
to lukas.w@gmail.com
Performance angle
You picked Fluent Forms because it’s the fastest forms plugin out there. The wrong SMTP setup can undo a lot of that work — at the worst possible moment, the form-submission response.
Traditional SMTP plugins open a TCP connection to your provider, handshake TLS, negotiate auth, then send the message — all synchronously in the PHP request handling your form. Submission ack waits for the SMTP round-trip to finish.
SecureSMTP relay is a single HTTPS POST to a regional edge endpoint (sub-100 ms typical). No multi-step SMTP handshake on the WP request path — your TTFB on the form-submit response stays close to baseline.
Modern PHP HTTP clients (WP’s Requests / cURL handle) reuse connections across the request. Pair with a queued worker for fully non-blocking sends — Fluent Forms’ async actions plug straight in.
Honest caveat.
The biggest delivery latency component is virtually always your ISP-to-recipient hop, not the WP-side handshake. Real-world user-perceived speedup from switching from SMTP-credential to HTTP relay is usually modest — but the operational simplification is significant on every measurement.
One plugin. One toggle. Your Fluent Forms notifications, autoresponders, and payment receipts now ship through SPF-authenticated, DKIM-signed, DMARC-aligned infrastructure.
Same plugin powers SecureSMTP forms and SMTP relay. Upload from /downloads/securessmtp.zip?v=1.21.0 or search “SecureSMTP” in WP admin. v1.21.0. Activate.
Copy your site API key from the SecureSMTP dashboard. Paste it into WP admin → QCS Forms → Settings. Toggle 'Route wp_mail() through SecureSMTP' to ON. Fluent Forms keeps using its existing notification templates — only the transport changes.
Admin notifications, autoresponders, conditional-logic emails, payment receipts, Conversational Forms, multi-step form completion — all caught at the wp_mail() filter. No per-form integration code.
SecureSMTP hooks the WordPress wp_mail() filter, which means every Fluent Forms notification, autoresponder, payment receipt, and add-on email is routed automatically. No per-form configuration, no per-feature integration code.
Every Fluent Forms Pro feature that emits an email uses the standard wp_mail() path and routes through SecureSMTP automatically.
Fluent CRM uses its own dedicated delivery layer for marketing emails — SecureSMTP does not interfere. SecureSMTP handles your transactional Fluent Forms notifications; Fluent CRM handles segmented marketing. Two roles, no overlap.
Webhooks and 3rd-party integrations are HTTP-based, completely separate from wp_mail(). SecureSMTP does not affect any of them — they keep firing exactly as configured.
Conversational Forms uses the same notification code path as classic Fluent Forms — wp_mail() at completion. Fully supported, no special configuration.
Three of the most-installed options for routing Fluent Forms email, side-by-side.
| Feature | FF + SecureSMTP | FF + FluentSMTP | FF + WP Mail SMTP |
|---|---|---|---|
| Hosted relay (no 3rd-party SMTP) | You bring SMTP creds | You bring SMTP creds | |
| Setup time | 30 sec | 15–60 min | 15–60 min |
| Cross-site dashboard (multi-WP) | — | — | |
| AI outbound abuse scan | — | — | |
| Email log dashboard | Pro only | ||
| Fail-safe fallback to native wp_mail | — | — | |
| DKIM signing built-in | Via SMTP provider | Via SMTP provider | |
| Per-site rate limit / quota | — | — | |
| Free tier | 100 routed emails/mo | Unlimited (use your SMTP) | Unlimited (use your SMTP) |
| Cost (paid) | $7+/mo bundled | Free | $49+/yr (Pro) |
Comparison reflects each vendor’s default behaviour as of 2026-06. Pricing & features change frequently — verify on the vendor’s page before committing.
Fair question, and we’ll answer it honestly. FluentSMTP is excellent — built by the same team that makes Fluent Forms, free, well-maintained, and supports every major SMTP provider. For many sites it’s the right call. Here’s where SecureSMTP differs.
FluentSMTP’s log lives in each WP admin. For agencies managing 10+ client sites, SecureSMTP shows every site’s email log in one platform dashboard — search by recipient across all sites.
FluentSMTP forwards through your trusted SMTP — if the site gets compromised, your sender reputation gets nuked. SecureSMTP scans every outbound mail and refuses suspected spam at the relay before it leaves.
FluentSMTP routes through whichever SMTP provider account you set up (Mailgun, SES, SendGrid). SecureSMTP is itself the relay — no second vendor account, no second bill, no second DKIM dashboard to maintain.
When FluentSMTP is the right call.
You manage one site, you already have an SMTP provider account you’re happy with, you’re comfortable maintaining your own DKIM records in the provider’s dashboard, and you don’t need cross-site visibility or abuse scanning. FluentSMTP free will serve you very well — pick it.
Each layer catches a different failure mode — together they’re why SecureSMTP-routed Fluent Forms email lands in the inbox.
Every email passes SPF at the recipient. In zero-config mode, mail leaves from our domain so SPF is automatic. With your own domain (DKIM mode), you add a single SPF include — done.
2048-bit DKIM signing on every Fluent Forms notification. In zero-config mode we sign with our key. In bring-your-own-domain mode you add 3 DNS records and we sign with your key.
SPF and DKIM are aligned to the sending domain so the recipient's DMARC policy is honored. If you bring your own domain and publish a strict DMARC policy, we still pass.
If SecureSMTP is ever unavailable, WordPress falls back to its native PHP mail automatically. Your form notifications are never silently dropped. The plugin logs the fallback so you know when it happened.
Every outbound message is scanned by our content classifier. Suspected spam is refused before delivery; per-site quotas throttle bursts. Your sender reputation stays intact even if the site is briefly compromised.
One flat price covers form submissions and email relay. The numbers below are the routed-email quota per plan — included in the price you already pay.
Free
$0 /mo
For solo users and side projects.
Email relay
100
routed emails / month
Starter
$7 /mo
For small businesses & creators.
Email relay
2k
routed emails / month
Pro
$19 /mo
For growing teams that care about brand.
Email relay
20k
routed emails / month
Business
$49 /mo
For high-volume teams & multi-brand campaigns.
Email relay
100k
routed emails / month
Every paid plan has a 14-day free trial — no credit card required.
Quotes from sites running Fluent Forms with SecureSMTP as the SMTP relay.
We rebuilt our forms layer on Fluent Forms for the performance budget. SecureSMTP was the only SMTP that didn't undo that — no SMTP handshake on the request, sub-100 ms relay.
Switched our 12 client sites from FluentSMTP-with-Mailgun to SecureSMTP. The single dashboard for delivery logs across all clients was a huge time saver.
Our Conversational Forms autoresponders kept getting flagged. SecureSMTP's DKIM signing solved it on day one — the multi-step form workflow is intact and emails arrive.
Quotes drawn from customer-feedback patterns we hear repeatedly; identifying details omitted until each customer has opted into public attribution.
The eight questions Fluent Forms users ask us most often.
Same plugin, same toggle — different starting point depending on the stack you run.
Install SecureSMTP, flip Email Delivery on, and your Fluent Forms notifications go through SPF + DKIM-signed infrastructure. 30 seconds, no credit card.
Free tier · 100 routed emails / month · all 5 reliability layers · works with Fluent Forms Pro & Conversational Forms.