Email Service Provider

WordPress SMTP Plugins (wp_mail)

Already send your site’s emails with WP Mail SMTP, FluentSMTP or Gravity SMTP? With MailerPress Pro, your newsletters can follow the same path through wp_mail(), with no extra account or API key.

More about WordPress SMTP Plugins (wp_mail)

Your WordPress SMTP plugin sends your newsletters too

With MailerPress Pro, your newsletters follow the same path as your site emails, through the SMTP plugin you already use.

  • WordPress Default provider: hands every MailerPress email to wp_mail(), the standard WordPress sending function.
  • Your plugin: for example WP Mail SMTP, FluentSMTP or Gravity SMTP.
  • Everything sent: campaigns, automation emails and sign-up confirmations.
  • Delivery: through the email service your SMTP plugin is connected to.

Requires MailerPress Pro. Read the WordPress Default guide

One place for delivery settings and logs

Your SMTP plugin stays in charge of sending, so there is nothing to configure twice.

  • No credentials: no API key or account to enter in MailerPress.
  • Sender: no sender field, and if your plugin forces its own address, that address wins.
  • Email log: MailerPress emails appear next to your other site emails, if your plugin keeps a log.
  • Headers: Reply-To and one-click unsubscribe headers are passed to wp_mail().

Only useful with an SMTP plugin

WordPress Default only improves delivery when an SMTP plugin handles wp_mail() on your site.

  • Not PHP Mail: PHP Mail (free) calls PHP’s mail() directly, and SMTP plugins never see those emails.
  • Without a plugin: wp_mail() uses your server’s mail function, with the same deliverability limits.
  • Large lists: prefer a direct connection to a sending service for more control over pace and bounces.

Bounces through the service behind your plugin

In the WordPress Default settings, pick the service your SMTP plugin sends through to track bounces.

  • Bounce tracking provider: Brevo, Mailgun, Mailjet, Postmark, SendGrid, Amazon SES, Emailit, SMTP2GO or Resend.
  • Webhook: add the URL in that service.
  • Service card: the same service must also be set up and enabled in MailerPress.
  • Verified notifications: Amazon SNS for Amazon SES, or a saved signing key, such as SendGrid’s Verification Key.

Set it up

Make sure your SMTP plugin already works, then start slow and speed up only if needed.

  • MailerPress Pro: it adds the WordPress Default provider.
  • Working SMTP plugin: it must already send your site’s emails correctly.
  • Conservative profile: start with 25 emails every 10 minutes.
  • Go faster: only if your plugin uses a transactional service with high limits.

Send your campaigns with the WordPress Default provider in MailerPress

How MailerPress connects WordPress & your SMTP plugin

Triggered in MailerPressSync DirectionAction in WordPress
Campaign sent→wp_mail() called for each email
Automation reaches a Send email step→Email handed to wp_mail()
Contact signs up with double opt-in→Confirmation email handed to wp_mail()
WooCommerce order email in Custom mode→Branded order email handed to wp_mail()
Test email requested→Test email delivered by your SMTP plugin
Managed by MailerPressSync DirectionPowered by your SMTP plugin
Email content and recipient→Delivery through the plugin’s email service
Reply-to and one-click unsubscribe→Reply-To and List-Unsubscribe headers
Sending frequency profile→25 to 250 emails every 10 minutes
Sender address←Forced by your SMTP plugin, if it sets one
Campaign email logs←Sent or Failed, as returned by wp_mail()
Bounced contact status←Webhook of the service behind the plugin

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