--- title: Nette Mail 4.1.3: So Your Emails Actually Arrive | daily.dev description: Nette Mail 4.1.3 is a backward-compatible release focused on email deliverability. Key additions include OAuth 2.0 (XOAUTH2) authentication for Gmail and... canonical: https://daily.dev/posts/nette-mail-4-1-3-so-your-emails-actually-arrive-dam7ate8u twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Nette Mail 4.1.3: So Your Emails Actually Arrive | daily.dev og:description: Nette Mail 4.1.3 is a backward-compatible release focused on email deliverability. Key additions include OAuth 2.0 (XOAUTH2) authentication for Gmail and... og:url: https://daily.dev/posts/nette-mail-4-1-3-so-your-emails-actually-arrive-dam7ate8u og:image: https://api.daily.dev/og/posts/dam7Ate8u.png og:image:alt: Nette Mail 4.1.3: So Your Emails Actually Arrive og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Nette Mail 4.1.3: So Your Emails Actually Arrive **[Nette](https://daily.dev/sources/nette)** · 5 min read · 0 upvotes · 0 comments ## Summary Nette Mail 4.1.3 is a backward-compatible release focused on email deliverability. Key additions include OAuth 2.0 (XOAUTH2) authentication for Gmail and Microsoft 365 SMTP, one-click unsubscribe headers per RFC 8058, Ed25519 DKIM signing alongside existing RSA support, and a security patch removing the DKIM `l=` body length tag that allowed arbitrary content to be appended to signed messages without breaking the signature. CssInliner now implements a proper CSS cascade (specificity, !important, inline style priority) instead of last-declaration-wins, fixing email rendering discrepancies. New FileMailer writes emails to disk for development/testing. Additional improvements cover international domain punycode conversion, STARTTLS on port 587 with TLS 1.2/1.3, persistent connection recovery, and smarter FallbackMailer behavior. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [More-reliable email in WordPress 6.9](https://daily.dev/posts/more-reliable-email-in-wordpress-6-9-8ax1pj7f9) · Make WordPress Core · 3 upvotes · 0 comments - [CSS: The bomb inside your inbox](https://daily.dev/posts/css-the-bomb-inside-your-inbox-qdzucfppp) · Hacker News · 0 upvotes · 0 comments - [Introducing Mailviews Early Access](https://daily.dev/posts/introducing-mailviews-early-access-w9secmold) · Laravel News · 0 upvotes · 0 comments --- Tags: [#php](https://daily.dev/tags/php) [View this post on daily.dev](https://daily.dev/posts/nette-mail-4-1-3-so-your-emails-actually-arrive-dam7ate8u) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Nette Mail 4.1.3: So Your Emails Actually Arrive","url":"https://daily.dev/posts/nette-mail-4-1-3-so-your-emails-actually-arrive-dam7ate8u","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/nette-mail-4-1-3-so-your-emails-actually-arrive-dam7ate8u"},"datePublished":"2026-07-27T17:13:21.595Z","dateModified":"2026-07-27T17:14:29.566Z","description":"Nette Mail 4.1.3 is a backward-compatible release focused on email deliverability. 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