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Microsoft Outlook
Microsoft Outlook email client
About this crawler
Microsoft Outlook is a web crawler identified by the regular-expression pattern Microsoft Outlook in the User-Agent request header. It is categorised as http-library. Use the regex above to detect, log, allow, or block Microsoft Outlook traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- Microsoft Outlook
- Pattern
Microsoft Outlook- Tags
- http-library
- Added
- 2026/05/09
- Instances
- 5 known sample(s)
Sample User-Agent strings
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3; Microsoft Outlook 14.0.6025)
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3; Microsoft Outlook 15.0.4805; ms-office; MSOffice 15)
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Win64; x64; Trident/7.0; .NET CLR 2.0.50727; SLCC2; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3; .NET4.0E; Microsoft Outlook 14.0.7167; ms-office; MSOffice 14)
Microsoft Office/16.0 (Microsoft Outlook Mail 16.0.7167; Pro)
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; Tablet PC 2.0; MALNJS; Microsoft Outlook 16.0.6001; ms-office; MSOffice 16)
Block this crawler
robots.txt — disallow Microsoft Outlook:
User-agent: Microsoft Outlook
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Microsoft Outlook [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Microsoft Outlook") {
return 403;
}
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