{"id":241,"date":"2026-09-23T11:17:53","date_gmt":"2026-09-23T09:17:53","guid":{"rendered":"https:\/\/mu.klytic.com\/klytic-mta-2\/"},"modified":"2026-09-29T01:04:46","modified_gmt":"2026-09-28T23:04:46","slug":"klytic-mta","status":"publish","type":"page","link":"https:\/\/mu.klytic.com\/en\/klytic-mta\/","title":{"rendered":"Klytic MTA"},"content":{"rendered":"\t\t
\n\t\t\t\t
\n
\n
\n
\n \t\t\t

\ud83d\udee1\ufe0f Email Security<\/p>\n\t\t\t\t\t

Klytic MTA stops dangerous emails before they reach you<\/h1>\n\t\t\t\t\t

Phishing, CEO fraud, fake invoices, booby-trapped attachments: most cyberattacks start with an email. Klytic MTA analyzes every incoming message with over 40 specialized detectors, allowing only safe content to pass through.<\/p>\n\t\t

\n \t\t\t\n\tTry for free\n<\/a>\n\t\t\t\t\t\n\tView pricing\n<\/a>\n\t\t\n<\/div>\n\n<\/div>\n
\n \t\t\t

The Email Journey<\/p>\n\t\t\t\t\t

\ud83c\udf10 Internet<\/p>\n\t\t\t\t\t

\u2193<\/p>\n\t\t

\n \t\t\t

\ud83d\udee1\ufe0f Klytic MTA
<\/p>\n\t\t\t\t\t

authentication \u00b7 reputation \u00b7 content \u00b7 attachments<\/p>\n\t\t\n<\/div>\n\t\t\t

\u2193<\/p>\n\t\t

\n \t\t\t

\u2705 Inbox<\/p>\n\t\t\t\t\t

\ud83d\udeab Encrypted Quarantine<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n

\n
\n
\n \t\t\t

Threats a simple antispam can't see<\/h2>\n\t\t\t\t\t

Scammers are no longer content with just sending spam. They impersonate your bank, your supplier, or even your executive.<\/p>\n\t\t\n<\/div>\n

\n
\n \t\t\t

\ud83c\udfa3<\/p>\n\t\t\t\t\t

Phishing<\/h3>\n\t\t\t\t\t

Fake login sites, brand impersonation, lookalike domains, booby-trapped QR codes.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83d\udc54<\/p>\n\t\t\t\t\t

CEO Fraud<\/h3>\n\t\t\t\t\t

A fake executive or supplier requests an urgent transfer or a change of bank details.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83e\uddfe<\/p>\n\t\t\t\t\t

Scams<\/h3>\n\t\t\t\t\t

Fake invoices, fake refunds, cryptocurrency scams, or phone recall scams.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83d\udcce<\/p>\n\t\t\t\t\t

Booby-trapped Attachments<\/h3>\n\t\t\t\t\t

Viruses, Office macros, malicious PDFs and HTML files, removed before reaching the user.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n

\n
\n
\n \t\t\t

How Klytic MTA Protects You<\/h2>\n\t\t\t\t\t

Every email goes through multiple layers of analysis. Signals are cross-referenced to decide: deliver, quarantine, or reject.<\/p>\n\t\t\n<\/div>\n

\n
\n \t\t\t

1. Is the sender authentic?<\/h3>\n\t\t\t\t\t

SPF, DKIM, and DMARC verification, server and domain reputation, domain age, blacklists.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

2. Is the message suspicious?<\/h3>\n\t\t\t\t\t

Analysis of links, content, known scam scenarios, and anomalies compared to sender habits.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

3. Are the attachments safe?<\/h3>\n\t\t\t\t\t

Antivirus, inspection of macros, PDFs, HTML files, and QR codes contained in images.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

4. And at the time of clicking?<\/h3>\n\t\t\t\t\t

Links can be re-analyzed when the user clicks: a site trapped after delivery is still blocked.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n

\n
\n
\n \t\t\t

More than a filter: a true security console<\/h2>\n\t\t\n<\/div>\n
\n
\n \t\t\t

\ud83d\udce5<\/p>\n\t\t\t\t\t

Encrypted Quarantine<\/h3>\n\t\t\t\t\t

Dangerous messages are isolated and encrypted. Secure release with one click if needed.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83d\udcca<\/p>\n\t\t\t\t\t

DMARC Reports<\/h3>\n\t\t\t\t\t

Control of SPF, DKIM, and DMARC configuration for your domains, with alerts and correction advice.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\u270d\ufe0f<\/p>\n\t\t\t\t\t

Signed Outgoing Emails<\/h3>\n\t\t\t\t\t

DKIM signing of your emails, even if your current messaging system doesn't do it, and S\/MIME for sensitive exchanges: better deliverability, less impersonation.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\u23f1\ufe0f<\/p>\n\t\t\t\t\t

Send Delay<\/h3>\n\t\t\t\t\t

A short delay before sending allows you to recall an email sent to the wrong recipient.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83d\udcf0<\/p>\n\t\t\t\t\t

Newsletter Sorting<\/h3>\n\t\t\t\t\t

Newsletters and promotions are recognized and can be categorized separately.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83d\udcf2<\/p>\n\t\t\t\t\t

VIP Alerts<\/h3>\n\t\t\t\t\t

Option: an SMS notifies you when an important sender emails you.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83e\udde0<\/p>\n\t\t\t\t\t

Learning<\/h3>\n\t\t\t\t\t

User reports improve filtering and reduce false positives.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\ud83d\udccb<\/p>\n\t\t\t\t\t

Traceability<\/h3>\n\t\t\t\t\t

Every decision is explained. CIS \/ NIST compliant logs, exportable to your SIEM.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n

\n
\n
\n \t\t\t

Two levels of protection<\/h2>\n\t\t\t\t\t

Klytic MTA is available in two offerings. Advanced includes all Essential features.<\/p>\n\t\t

\n \t\t\t

Essential<\/strong>: the inbox is protected from common threats, booby-trapped attachments, and hasty sends.<\/p>\n\t\t\t\t\t

Advanced<\/strong>: all Essential features, plus financial fraud, click protection, and management.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n

\n
\n \t\t\t

Filter Modules<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

Essential<\/p>\n\t\t\t\t\t

Basic Protection<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

Advanced<\/p>\n\t\t\t\t\t

All Essential +<\/p>\n\t\t\n<\/div>\n\t\t\t

Authentication and Reputation<\/p>\n\t\t\t\t\t

DKIM, SPF, and MX Control<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

DMARC verification, including for forwarded emails (ARC)<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Server and domain reputation: blacklists, PTR, domain age, BIMI<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Targeted deferral of unknown senders (intelligent greylisting)<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Common Threats<\/p>\n\t\t\t\t\t

Antispam, antivirus, and encrypted quarantine<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Anti-phishing, brand impersonation, QR codes<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Lookalike domains and display name impersonation<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Office macros and booby-trapped PDFs<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Dangerous attachments removed, with an informational message<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Secure quarantine release and notifications<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Sending<\/p>\n\t\t\t\t\t

DKIM signing of outgoing emails, even if your messaging system doesn't do it<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Recall before sending a message<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

S\/MIME for sensitive exchanges<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Filter Intelligence<\/p>\n\t\t\t\t\t

Shared learning across all instances<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

AI arbitration of ambiguous messages<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Signal correlation and false positive reduction<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Detection of campaigns and unusual sender behavior<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Newsletter and promotion sorting<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Personalization<\/p>\n\t\t\t\t\t

Whitelists and blacklists specific to each user<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Modules activatable and adjustable per domain<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Five-level policies: network, sender, trusted entities, business context, user<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Confidentiality and Transparency<\/p>\n\t\t\t\t\t

No message storage in normal operation<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Every decision explained: score and reason in headers<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Financial Fraud<\/p>\n\t\t\t\t\t

CEO fraud<\/p>\n\t\t\t\t\t

\u2014<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Fake invoices, fake transfers, crypto, refunds, financing, phone calls<\/p>\n\t\t\t\t\t

\u2014<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Click Protection and Advanced Attachments<\/p>\n\t\t\t\t\t

Links re-analyzed at the time of click<\/p>\n\t\t\t\t\t

\u2014<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Booby-trapped HTML files and hidden text in images<\/p>\n\t\t\t\t\t

\u2014<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Management<\/p>\n\t\t\t\t\t

DMARC Console: reports, alerts, and correction paths<\/p>\n\t\t\t\t\t

\u2014<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

CIS \/ NIST logs, exportable to your SIEM<\/p>\n\t\t\t\t\t

\u2014<\/p>\n\t\t\t\t\t

\u2713<\/p>\n\t\t\t\t\t

Optional<\/p>\n\t\t\t\t\t

SMS alert when an important sender emails you<\/p>\n\t\t\t\t\t

Option<\/p>\n\t\t\t\t\t

Option<\/p>\n\t\t\t\t\t

S\/MIME certificate provision<\/p>\n\t\t\t\t\t

Option<\/p>\n\t\t\t\t\t

Option<\/p>\n\t\t\n<\/div>\n\t\t\t

\u2713 included \u00b7 \u2014 not included \u00b7 Option: extra, on both offers<\/p>\n\t\t\t\t\t

See pricing \u2192<\/a><\/p>\n\t\t\n<\/div>\n\n<\/div>\n

\n
\n
\n \t\t\t

Your emails are not stored<\/h2>\n\t\t\t\t\t

In normal operation, Klytic MTA analyzes and delivers your messages without storing them. An email is only kept if the destination server is unavailable or if it is dangerous (quarantine): it is then encrypted (AES-256-GCM) and temporarily stored, until its delivery or the expiration of the deadline.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

\u2705 Compatible with Klytic Mail, Microsoft 365, Google Workspace, Exchange, and any mail server<\/p>\n\t\t\t\t\t

\u2705 Deployable in our cloud, on a dedicated instance, or on-premise<\/p>\n\t\t\t\t\t

\u2705 Quick setup: simply modify your domain's MX record<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n

\n
\n \t\t\t

Frequently Asked Questions<\/h2>\n\t\t
\n \t\t\t

I use Microsoft 365 or Google: can I use Klytic MTA?<\/h3>\n\t\t\t\t\t

Yes. Klytic MTA sits in front of your current email system, whatever it may be. You keep your tools and add enhanced protection.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

What if a legitimate email is blocked?<\/h3>\n\t\t\t\t\t

It's in quarantine, not lost. It can be released with one click, and the system takes this into account for subsequent messages.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

Do you read my emails?<\/h3>\n\t\t\t\t\t

No. Analysis is automatic, and your messages are not stored in normal operation. Only technical data (score, reason for decision) is kept for statistics.<\/p>\n\t\t\n<\/div>\n

\n \t\t\t

How long does setup take?<\/h3>\n\t\t\t\t\t

Generally 24 to 48 hours. We prepare the configuration, you modify your domain's MX record (or we do it for you).<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n

\n
\n \t\t\t

Protect your teams from email scams<\/h2>\n\t\t\t\t\t

30-day free trial, without changing your email system.<\/p>\n\t\t\t\t\t\n\tActivate my protection\n<\/a>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

\ud83d\udee1\ufe0f Email Security Klytic MTA stops dangerous emails before they reach you Phishing, CEO fraud, fake invoices, booby-trapped attachments: most cyberattacks start with an email. Klytic MTA analyzes every incoming message with over 40 specialized detectors, allowing only safe content to pass through. Try for free View pricing The Email Journey \ud83c\udf10 Internet \u2193 \ud83d\udee1\ufe0f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_seopress_titles_title":"Email filtering: anti-spam and anti-phishing in Mauritius","_seopress_titles_desc":"Klytic MTA blocks spam, phishing, CEO fraud and dangerous attachments before they reach your inbox. AI arbitration, DKIM, S\/MIME. Hosted in Mauritius or Europe.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"Email filtering: anti-spam and anti-phishing in Mauritius","_seopress_social_fb_desc":"Klytic MTA blocks spam, phishing, CEO fraud and dangerous attachments before they reach your inbox. AI arbitration, DKIM, S\/MIME. Hosted in Mauritius or Europe.","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"Email filtering: anti-spam and anti-phishing in Mauritius","_seopress_social_twitter_desc":"Klytic MTA blocks spam, phishing, CEO fraud and dangerous attachments before they reach your inbox. AI arbitration, DKIM, S\/MIME. Hosted in Mauritius or Europe.","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"email filtering,business anti-spam,anti-phishing,email security,secure email gateway,Mauritius,Indian Ocean","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"class_list":["post-241","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/pages\/241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/comments?post=241"}],"version-history":[{"count":1,"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/pages\/241\/revisions"}],"predecessor-version":[{"id":247,"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/pages\/241\/revisions\/247"}],"wp:attachment":[{"href":"https:\/\/mu.klytic.com\/en\/wp-json\/wp\/v2\/media?parent=241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}