Reliable WordPress email delivery with multiple providers, two connections, Return Path, Reply-To and visual AND/OR routing.
Alternatives to Space Checker
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
Relevant replacements
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
Tells shoppers whether a product will fit through their door, up their stairs, into their elevator or in their car, before they buy.
Send all WordPress emails through SendByte SMTP with logging, test email, sandbox mode, delivery dashboard, and connection health check.
PressHangar Site Checkupv0.3.2
Free, read-only WordPress health check: find overlapping or duplicate plugins, bloat, and unused plugins & themes — in plain language.
Inspect email authentication and mail attempts with SPF, DKIM, DMARC diagnostics, privacy-conscious logs and WooCommerce support.
Check SPF, DMARC, BIMI, MTA-STS and TLS-RPT records for any domain. Embed email authentication checkers with a shortcode.
CodingBunny Mail SMTPv1.0.7
Configure an SMTP server to send emails from your WordPress site. Simple, lightweight, and secure.
Gmail SMTPv1.2.3.23
Connect to Gmail SMTP server to automatically send email from your WordPress site. Configure wp_mail() to use SMTP with OAuth 2.0 authentication.
Stop WordPress emails from going to spam. Send emails via SMTP and check SPF, DKIM, DMARC records to improve email deliverability.
SMTP Mailerv1.1.28
Configure a SMTP server to send email from your WordPress site. Configure the wp_mail() function to use SMTP instead of the PHP mail() function.