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DocumentationSMTP Relay

SMTP Relay

For frameworks and platforms that can’t easily call our REST API, use the SMTP relay. Same DKIM signing, suppression, billing, and webhook delivery — your app just speaks plain SMTP.

Connection

SettingValue
Hostsmtp.splashifypro.com
Port587 (STARTTLS) or 465 (TLS)
Usernameemailapikey (literal)
Passwordpk_live_... (your API key)

TLS is required. Plain-text auth is rejected.

Test with swaks

swaks --to customer@example.com \
      --from hello@yourcompany.com \
      --server smtp.splashifypro.com \
      --port 587 -tls \
      --auth-user emailapikey \
      --auth-password "$SPLASHIFY_API_KEY" \
      --header "Subject: Test from swaks" \
      --body "Hello"

WordPress (WP Mail SMTP)

  1. Plugin → WP Mail SMTP → install
  2. Mailer → Other SMTP
  3. Host: smtp.splashifypro.com · Port: 587 · Encryption: TLS
  4. Auth: ON · Username: emailapikey · Password: your API key
  5. Save & send a test email

Django

# settings.py
EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
EMAIL_HOST = "smtp.splashifypro.com"
EMAIL_PORT = 587
EMAIL_USE_TLS = True
EMAIL_HOST_USER = "emailapikey"
EMAIL_HOST_PASSWORD = os.environ["SPLASHIFY_API_KEY"]
DEFAULT_FROM_EMAIL = "hello@yourcompany.com"

Laravel

MAIL_MAILER=smtp
MAIL_HOST=smtp.splashifypro.com
MAIL_PORT=587
MAIL_USERNAME=emailapikey
MAIL_PASSWORD=${SPLASHIFY_API_KEY}
MAIL_ENCRYPTION=tls
MAIL_FROM_ADDRESS=hello@yourcompany.com

Node (nodemailer)

import nodemailer from "nodemailer";
 
const transport = nodemailer.createTransport({
  host: "smtp.splashifypro.com",
  port: 587,
  secure: false,                    // STARTTLS
  auth: {
    user: "emailapikey",
    pass: process.env.SPLASHIFY_API_KEY,
  },
});
 
await transport.sendMail({
  from: "hello@yourcompany.com",
  to: "customer@example.com",
  subject: "Hello",
  html: "<p>Welcome</p>",
});

Postfix

In /etc/postfix/main.cf:

relayhost = [smtp.splashifypro.com]:587
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_use_tls = yes
smtp_tls_security_level = encrypt

In /etc/postfix/sasl_passwd:

[smtp.splashifypro.com]:587 emailapikey:pk_live_...
postmap /etc/postfix/sasl_passwd
chmod 600 /etc/postfix/sasl_passwd*
postfix reload

Things to know

  • From-domain still has to be verified. Same rule as the REST API — sends from unverified domains are rejected.
  • Suppression list applies. Recipients on your account suppression list are silently dropped.
  • Billing is identical. ₹0.01/email, first 200/day in sandbox are free.
  • Webhooks fire normally. SMTP and REST sends produce the same event stream into your configured destinations.
  • Per-message metadata via headers. Set X-Configuration-Set: <name> on the outbound message to attribute the send to a config set.
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