{"id":26817,"date":"2025-08-04T15:15:10","date_gmt":"2025-08-04T15:15:10","guid":{"rendered":"https:\/\/www.retarus.com\/blog\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\/"},"modified":"2026-08-12T08:43:45","modified_gmt":"2026-08-12T08:43:45","slug":"gain-more-control-over-your-outbound-emails-our-new-attachment-blocker","status":"publish","type":"post","link":"https:\/\/www.retarus.com\/blog\/en\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\/","title":{"rendered":"Gain more control over your outbound emails: Our new attachment blocker"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Retarus Attachment Blocker is a proven tool that protects your network from emails with malicious attachments or dangerous file formats. It effectively augments your protection against malware, zero-day exploits and other email-related threats. In <a href=\"https:\/\/www.retarus.com\/blog\/en\/dangerous-file-types-why-consistently-blocking-them-may-be-the-smart-approach\/\">a previous blog post<\/a>, we explained why consistently blocking certain file types, regardless of threat detection outcomes, plays a crucial role in any email security strategy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We&#8217;re excited to share more on this topic, as promised, because the <strong>completely revamped Retarus Attachment Blocker<\/strong> is now available \u2013 with a substantial number of additional functions to provide more control, higher security and maximum flexibility.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-full-control-manage-inbound-and-outbound-emails-centrally\"><strong>Full control: Manage inbound and outbound emails centrally<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One key enhancement in this updated version is the ability to manage rules for both inbound and outbound emails directly within the Retarus <strong>myEAS<\/strong> admin portal \u2013 from a single location, now featuring a clean, user-friendly design. This gives companies the opportunity to transparently implement their security guidelines \u2013 not only for blocking inbound threats, but also for preventing the outbound transmission of file types deemed sensitive or undesirable.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Specifying outbound rules in the Attachment Blocker improves compliance and supports the implementation of internal guidelines. Unintended data outflow can effectively be prevented, for instance, by blocking the possibility to share certain file types used in applications with purely internal purposes \u2013 file types containing sensitive information which should never be sent via email. The transmission of ZIP archives can also be blocked to prevent high volumes of data being sent out via email.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One particularly useful feature is the ability to configure outbound rules with a high degree of granularity \u2013 at domain, group or even individual user level. This enables specific departments, for instance, to continue sending certain document types, while their transmission is blocked for other parts of the company.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a8f98102e703&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a8f98102e703\" class=\"wp-block-image aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"605\" height=\"228\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-outbound.jpg\" alt=\"Auch f\u00fcr Outbound: \u00dcbersichtliche Konfiguration inklusive Benachrichtigungseinstellungen f\u00fcr Admins.\" class=\"wp-image-3625\" srcset=\"https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-outbound.jpg 605w, https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-outbound-300x113.jpg 300w\" sizes=\"auto, (max-width: 605px) 100vw, 605px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\"><em><em>Also for outbound transmission: User-friendly configuration including notification settings for admins.<\/em><\/em><\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-support-for-new-and-additional-file-types\"><strong><strong>Support for new and additional file types<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to the new administration options, this version now supports and recognizes a wide range of new and additional file formats and properties. These changes substantially broaden the potential opportunities for deploying the Attachment Blocker.<\/p>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a8f98102eca9&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a8f98102eca9\" class=\"wp-block-image aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"756\" height=\"640\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-inbound.jpg\" alt=\"Individuelle Filterung f\u00fcr individuelle Anforderungen: Konfiguration \u00fcber das Retarus Admin-Portal myEAS.\" class=\"wp-image-3626\" srcset=\"https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-inbound.jpg 756w, https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-inbound-300x254.jpg 300w\" sizes=\"auto, (max-width: 756px) 100vw, 756px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\"><em><em>Tailored filtering for specific needs: Configuration via the Retarus myEAS admin portal.<\/em><\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-new-options-for-dealing-with-blocked-emails\"><strong><strong>New options for dealing with blocked emails<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For inbound traffic, new configuration options add real value. Admins can now decide flexibly how to handle disallowed attachments. They can be deleted immediately, as before, or moved to the user\u2019s quarantine. This gives companies full control over their inbound communication while ensuring that important content isn\u2019t accidentally lost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-transparent-notifications-with-custom-configuration\"><strong><strong>Transparent notifications with custom configuration<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The notification function has also been revamped. In the latest version, the company\u2019s administrators and the senders of blocked messages both benefit from clearer, more configurable, and more transparent notification options.<\/p>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a8f98102f077&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a8f98102f077\" class=\"wp-block-image aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"590\" height=\"175\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-Admin-Notification.jpg\" alt=\"Mehr Sicherheit durch vertrauensw\u00fcrdige Absenderadressen.\" class=\"wp-image-3627\" srcset=\"https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-Admin-Notification.jpg 590w, https:\/\/www.retarus.com\/blog\/wp-content\/uploads\/sites\/41\/2026\/07\/Attachment-Blocker-Admin-Notification-300x89.jpg 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\"><em><em>Trustworthy sender addresses boost security.<\/em><\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-increased-security-through-granular-roles-and-permissions-management\"><strong>Increased security through granular roles and permissions management<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Administration of the Attachment Blocker has been optimized to allow finely tuned assignment of roles and rights. It is now possible to specify with great granularity which roles have access to different configuration levels. This ensures critical security guidelines are met more reliably \u2013 a clear advantage for larger IT teams or multi-tenant organizations.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-beta-version-now-available-official-roll-out-at-the-end-of-q3\"><strong><strong>Beta version now available \u2013 official roll-out at the end of Q3<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The new Attachment Blocker is now available as a beta version. Customers interested in early access can contact their regular Retarus support representative. Within Retarus myEAS, users can easily switch between the previous and new interfaces.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The official rollout to all users is scheduled for the end of the current quarter.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Retarus Attachment Blocker reliably protects your network from emails containing malicious attachments or dangerous file properties. This proven tool effectively enhances your protection against malware, zero-day exploits, and other email-related threats. The newly updated version offers additional features for even greater control.<\/p>\n","protected":false},"author":12,"featured_media":3629,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ret_read_more_text":"","ret_thumb_border":false,"footnotes":""},"categories":[3043],"tags":[43,141],"ret_content_type":[3071],"class_list":["post-26817","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","tag-email-security","tag-retarus-attachment-blocker","ret_content_type-product-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Gain more control over your outbound emails: Our new attachment blocker | Retarus Blog<\/title>\n<meta name=\"description\" content=\"Retarus Attachment Blocker reliably protects your network from emails containing malicious attachments or dangerous file properties. This proven tool effectively enhances your protection against malware, zero-day exploits, and other email-related threats. The newly updated version offers additional features for even greater control.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.retarus.com\/blog\/en\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gain more control over your outbound emails: Our new attachment blocker\" \/>\n<meta property=\"og:description\" content=\"Retarus Attachment Blocker reliably protects your network from emails containing malicious attachments or dangerous file properties. This proven tool effectively enhances your protection against malware, zero-day exploits, and other email-related threats. The newly updated version offers additional features for even greater control.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.retarus.com\/blog\/en\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\/\" \/>\n<meta property=\"og:site_name\" content=\"Retarus Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/retarus\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-04T15:15:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-12T08:43:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.retarus.com\/blog-transfer\/wp-content\/uploads\/sites\/41\/2026\/07\/AdobeStock_1232122888.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"S\u00f6ren Schulte\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@retarus\" \/>\n<meta name=\"twitter:site\" content=\"@retarus\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"S\u00f6ren Schulte\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/\"},\"author\":{\"name\":\"S\u00f6ren Schulte\",\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/#\\\/schema\\\/person\\\/da5eb37e5936738ea4e12be8b429433d\"},\"headline\":\"Gain more control over your outbound emails: Our new attachment blocker\",\"datePublished\":\"2025-08-04T15:15:10+00:00\",\"dateModified\":\"2026-08-12T08:43:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/\"},\"wordCount\":593,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/wp-content\\\/uploads\\\/sites\\\/41\\\/2026\\\/07\\\/AdobeStock_1232122888.jpg\",\"keywords\":[\"Email Security\",\"Retarus Attachment Blocker\"],\"articleSection\":[\"Cybersecurity\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/\",\"url\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/\",\"name\":\"Gain more control over your outbound emails: Our new attachment blocker | Retarus Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/en\\\/gain-more-control-over-your-outbound-emails-our-new-attachment-blocker\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.retarus.com\\\/blog\\\/wp-content\\\/uploads\\\/sites\\\/41\\\/2026\\\/07\\\/AdobeStock_1232122888.jpg\",\"datePublished\":\"2025-08-04T15:15:10+00:00\",\"dateModified\":\"2026-08-12T08:43:45+00:00\",\"description\":\"Retarus Attachment Blocker reliably protects your network from emails containing malicious attachments or dangerous file properties. 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