XeroWP
UWH SMTP Connect – SMTP Email Delivery, Backup SMTP & Email Logs

UWH SMTP Connect – SMTP Email Delivery, Backup SMTP & Email Logs

5/5 (1 ratings) — active installs Updated Nov 4, 2026
emailemail deliveryemail logssmtpwoocommerce
Download v1.5.4 Plugin Website

UWH SMTP Connect is a free WordPress SMTP plugin for sending site emails through your own SMTP provider and investigating email delivery problems. Configure Google, Microsoft 365 or a custom SMTP host, send test emails, review transport logs, and enable optional recovery tools for temporary connection failures.

It combines SMTP setup, backup failover, encrypted retries and privacy-conscious wp_mail() reporting.

WordPress SMTP features

  • Google, Microsoft 365 & custom SMTP: Provider cards populate common host settings. Configure From Email, authentication and TLS/STARTTLS or SSL/SMTPS. Gmail may require a supported app password; OAuth is not included. Microsoft SMTP AUTH availability depends on your provider and account policy.
  • Backup SMTP connection: Use an optional secondary SMTP server with separately encrypted credentials. Backup is attempted only for identifiable pre-connection failures, not password rejection, recipient rejection or uncertain delivery outcomes.
  • Automatic Email Retry: Optional and disabled by default. Eligible temporary connection failures can enter an encrypted retry queue, with up to two WP-Cron attempts. Attachments are not queued; see Privacy & limitations below.
  • Email Logs & CSV Export: Filter Accepted/Failed attempts without reloading the page. Review dates, transport, recipient counts and categorized errors, and export up to 500 log rows as CSV. Regular logs do not keep recipient addresses, subjects or email bodies.
  • SMTP Diagnostics / Connection Doctor: Administrator-triggered DNS and public SMTP connectivity checks, plus SPF, DMARC and MX guidance, DKIM setup notes and possible mail-plugin conflict detection. Results are diagnostic, not a guarantee of inbox delivery.
  • Delivery Recovery Insights: See primary SMTP failures, backup-accepted attempts and pending retries, and copy a privacy-safe troubleshooting summary.
  • WooCommerce Email Reports: Shown only when WooCommerce is active. View notification type, related order reference and sending outcome using 7-, 30- or 90-day filters. HPOS-compatible order lookups are used.
  • Professional Test Email: Send a mobile-friendly HTML test message with a plain-text alternative to check transport acceptance.
  • Privacy-first: No UWH account, license key or plugin telemetry. SMTP passwords are encrypted at rest using WordPress security salts.

Troubleshooting WordPress emails not sending

Use Test Email, Email Logs and Connection Doctor to investigate hosting restrictions, DNS issues and mail-plugin conflicts. Backup SMTP and Retry do not replace valid credentials or domain authentication.

A successful SMTP handoff does not prove the message reached the recipient’s inbox. SPF, DKIM, DMARC, sender reputation and recipient filters still affect delivery. Requires your own SMTP account; uses WordPress PHPMailer.

Privacy & limitations

Standard logs store timestamps, transport, recipient counts, status and categorized errors; they do not retain recipient email addresses, subjects or message bodies. WooCommerce reports record only email type, optional order ID, status and timestamp when WooCommerce is active and logging enabled.

When Automatic Email Retry is explicitly enabled, eligible failed emails without attachments (up to 128 KB) can have recipient addresses, subjects, bodies and headers stored temporarily encrypted in the WordPress database. The queue holds at most 50 messages. Items are removed after success, two unsuccessful retry attempts or scheduled 24-hour cleanup. Retry and cleanup depend on WP-Cron. Uncertain outcomes and messages with attachments are not queued. No retry system can guarantee zero duplicates; include this processing in your site’s privacy policy.

SMTP passwords are encrypted using AES-256-GCM with keys derived from WordPress security salts; changing the salts requires re-entering your credentials. SMTP TLS certificates are verified. Sites should use only one active plugin that configures the PHPMailer SMTP transport.

External SMTP services

When enabled, the plugin uses your configured SMTP provider, not a United Web Host mail relay. That provider processes authentication details, recipients, email content, attachments (if present) and transport metadata required to send email. Consult your chosen provider’s privacy policy and terms. Optional administrator-requested diagnostics perform DNS queries and unauthenticated connectivity checks to public SMTP servers; they do not transmit SMTP passwords. The plugin does not send usage analytics to UWH.

Provider policies: Google Privacy, Google Terms, Microsoft Privacy, Microsoft Terms.

Official resources

All plugin features are free. Your own SMTP provider may charge for email sending.

Default mail handling: Until SMTP is enabled, UWH SMTP Connect leaves the default WordPress wp_mail() transport unchanged. SMTP authentication is on by default; turning it off disables credentials fields without deleting saved credentials. Mail delivery depends on the hosting server and other active mail plugins.