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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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Recent Q&A’s
Recently Updated
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Debugging WordPress SMTP OAuth setups with Postman
Validate a Microsoft 365 or Google Workspace OAuth registration in Postman before wiring the client ID and secret into WP Mail SMTP, FluentSMTP, or Post SMTP.
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Email service webhooks in WordPress: events, verification, retries
How ESP delivery-status webhooks work in WordPress: what Postmark, Mailgun, SendGrid, SES and Mailjet send, how to receive them, and how to verify them.
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How Email Works: A WordPress Operator’s Reference
The five-stage delivery chain from wp_mail() to inbox, what the operator controls, and how SPF, DKIM, and DMARC work as a system.
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WordPress.com vs WordPress.org Email: Who Owns the Sending Pipeline
On WordPress.com, Automattic owns wp_mail’s transport and the sending domain. On self-hosted WordPress.org, the operator owns both. Every email-behaviour difference between the two platforms follows from that.
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Every Email WordPress Core Sends: the wp_mail catalog
The catalog of transactional emails WordPress core sends — comments, password resets, GDPR, updates, recovery mode — with trigger, default recipients, and the filters that control each one.
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Less Secure App access: what replaced it, when it shut down, and what to do now
Google shut down Less Secure App access — consumer Gmail May 2022, Workspace May 2025. The three replacements (OAuth, App Password, switch provider) and which fits which WordPress use case.
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Contact Form 7 review
Contact Form 7 uses wp_mail(), so any mailer plugin routes its submissions automatically. Free, no Pro tier, add-ons fill the rest.
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Zeptomail (by Zoho) as a WordPress SMTP Server
Zeptomail is Zoho’s transactional-only email relay. Credit-based pricing at $2.50/10K emails with no monthly fee. Best for sites already using Zoho.
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Netcore Email API (formerly Pepipost) as a WordPress SMTP Server
Netcore Email API (formerly Pepipost) is an enterprise-focused relay. Netcore has retired the public pricing page; paid tiers are sales-gated. Free tier allows 100 emails/day. Most WordPress sites should use simpler alternatives.
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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.
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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.
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Amazon SES as a WordPress SMTP Server
Amazon SES sends email at $0.10 per thousand – the cheapest in this category. The trade-off: IAM credentials, sandbox restrictions, no permanent free tier.