Whitelist MailBaby cPanel: Stop Greylisting and CSF Blocks
How to make sure bounces, delivery notifications and returned rSPAM messages from MailBaby's network reach your cPanel server promptly by trusting the relay range in greylisting, allowing it through CSF connection limits, and preventing SpamAssassin from penalising the relay hop.
September 29, 2026
What is MailBaby? Outbound SMTP relay pricing, limits and how it works
A practical overview of MailBaby, InterServer's outbound SMTP relay for hosting servers: what it filters, what it costs, the 6,000 messages per hour cap, retention, prohibited content and where it fits alongside your own Exim or Postfix.
September 29, 2026
WHMCS MailBaby SMTP Settings: Reliable Notifications with DKIM
Configure WHMCS to deliver invoices, tickets and system alerts through relay.mailbaby.net directly or via the host server's relay, with the exact mail settings, a DKIM setup that keeps your billing domain in Authentication-Results, and tests using the WHMCS mail log.
September 29, 2026
WordPress MailBaby SMTP Plugin: Setup and Testing
Two ways to get WordPress form submissions, order emails and password resets delivered through MailBaby: let the panel's Exim relay everything, or configure an SMTP plugin to authenticate directly to relay.mailbaby.net, with wp-config constants, a wp-cli test and the pitfalls that cause silent failures.
September 29, 2026
Postfix MailBaby Smarthost on Ubuntu and Debian: Secure Setup
Configure Postfix on Ubuntu 22.04/24.04 or Debian 12/13 to relay all outbound mail through relay.mailbaby.net with LOGIN SASL authentication and STARTTLS, including sasl_passwd hashing, rate limiting under the 6,000 per hour cap and log verification.
September 29, 2026
Using the MailBaby REST API: sending, logs and block management
A practical introduction to the MailBaby REST API at api.mailbaby.net (v1.5.0) for hosting providers: authorising domains, sending messages with attachments from scripts, pulling the 60-day log for tickets and monitoring, and listing or clearing blocked addresses.
September 29, 2026
MailBaby SPF Record: spf-c Include vs _mailbaby TXT Guide
Explains the two ways to authorise a domain for MailBaby relay, when to use include:spf-c.mailbaby.net in SPF and when the newer _mailbaby TXT ownership record is the better fit, with dig-based verification and the lookup-limit pitfall.
September 29, 2026
MailBaby vs Amazon SES vs SMTP2GO for hosting providers
A comparison of three outbound relay options for shared and reseller hosting servers, weighing pricing model, content filtering, hourly limits, panel integration effort, compromised-account handling and log access, with guidance on which fits which kind of fleet.
September 29, 2026
MailBaby SRS and Strict Forwarding Errors: Reliable Forwarders
Why forwarded mail is the most common source of MailBaby rejections on cPanel servers, how SRS rewrites the return path so SPF passes downstream, how to route forwards through a dedicated transport, and how to handle the backoff MailBaby applies to abusive forwarding.
September 29, 2026
MailBaby Newsletter Sending Limit: 6,000/Hour Without Spam Problems
Practical rules for hosting customers sending newsletters or mailing lists through a MailBaby relay: the per-address hourly cap, batching in Exim and list software, list hygiene, unsubscribe headers, content that scores badly and watching the relay log during a send.
September 29, 2026
MailBaby Plesk Webuzo Relay: Outbound Setup
How to send all outbound mail from a Plesk Obsidian server (Postfix or qmail) and a Webuzo server through relay.mailbaby.net with authentication, including the Plesk CLI and mail_smarthost settings, the Webuzo Exim override and verification.
September 29, 2026
DirectAdmin Exim MailBaby Relay: Smarthost Setup
How to route all outbound mail from a DirectAdmin server through relay.mailbaby.net using the exim.authenticators.post.conf, exim.transports.pre.conf and exim.routers.pre.conf override files, with SRS for forwarders and a check_limits fix for DirectAdmin 1.702 and later.
September 29, 2026