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nanoPost

The WordPress Email Authority

FREE expert advice on setup, maintenance, and troubleshooting

Your WordPress email problems solved

Welcome to nanoPost, or, as we’d like to think of ourselves, The WordPress Email Authority. Our mission is to help you solve your WordPress email problems, whether it’s setting up, maintaining, or troubleshooting. Our expert guides, Q&A, reviews, and news on WordPress SMTP, contact forms, and more are here to provide you make the best choices.

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    Recently Updated

    • Mail Queue WordPress plugin review

      Mail Queue by WDM queues WordPress email via the pre_wp_mail hook, leaving SMTP plugins untouched. Actively maintained: v1.6.1, tested up to WordPress 7.0.

    • addy.io Email Aliasing Service

      addy.io (formerly AnonAddy) is an independent, open-source email aliasing service. Unlimited standard aliases on custom domains from $3/month on the Pro tier.

    • Bird (formerly MessageBird, formerly SparkPost) as a WordPress SMTP server

      SparkPost operates as Bird’s email product after the 2022 acquisition. Self-service Startup (from $15/mo for 50K) and Growth (from $80/mo for 100K) tiers; dedicated IP is a $24.95/mo add-on on Growth and above. The official WordPress plugin remains closed as of March 2025.

    • SendGrid as a WordPress SMTP server

      SendGrid is a high-volume email platform owned by Twilio. Essentials plan starts at $19.95/month for 50,000 emails. Priced and featured above what most WordPress sites need, but a defensible choice at enterprise scale.

    • Postmark as a WordPress SMTP Server

      Postmark review, for WordPress: pricing from $15/mo for 10,000, stream separation, WP Mail SMTP setup. The right transactional default.

    • SPF for WordPress email: what the record does and how it fails

      SPF is the DNS TXT record that lists the servers allowed to send mail from your domain. Receivers check the sending IP against the list, and the record is where WordPress operators tell Gmail and Outlook which relay the site uses.

    • Free SMTP Servers for WordPress

      Thirteen free SMTP options for WordPress, ranked by whether the $0 tier is actually permanent. Permanent free plans, trials, and testing sandboxes – separated.

    • Pressable

      Pressable’s built-in relay sends WordPress mail without a plugin; 200 emails/hour and 4 unique sender addresses per 24 hours. No bundled mailboxes. Titan add-on at $3.50/inbox/month.

    • Flywheel

      Flywheel routes wp_mail through SendGrid without a plugin. Daily sending limits are undisclosed. Port 25 blocked; 465 and 587 open. No bundled mailboxes or forwarding.

    • DreamHost

      DreamHost bundles email with DreamPress; shared plans charge $1.99/mailbox/month after 3 months. PHP mail() unsigned; port 25 blocked. 100 recipients/hour cap.

    • Bluehost

      Bluehost includes domain email on all WordPress plans. Default wp_mail uses PHP mail(), unsigned. Sending limit is 500 emails/hour per domain. SMTP ports open.

    • Troubleshooting WordPress email: a reference

      WordPress email breaks at one of four stages in the delivery chain. The symptom (silent send, bounce, spam placement) does not tell you which stage. The diagnostic method is to find the stage first.