SMTBot
SimilarTech web crawler for technology detection
About this crawler
SMTBot is a web crawler identified by the regular-expression pattern SMTBot in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block SMTBot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.39%
Technical details
- Name
- SMTBot
- Pattern
SMTBot- Tags
- seo
- Reference
- http://www.similartech.com/smtbot
- Added
- 2014/10/04
- rDNS suffixes
.smtbot.com- Instances
- 5 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely SMTBot with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.smtbot.com
Sample User-Agent strings
Mozilla/5.0 (compatible; SMTBot/1.0; +http://www.similartech.com/smtbot)
SMTBot (similartech.com/smtbot)
Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 (compatible; SMTBot/1.0; +http://www.similartech.com/smtbot)
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36 (compatible; SMTBot/1.0; +http://www.similartech.com/smtbot)
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36 (compatible; SMTBot/1.0; http://www.similartech.com/smtbot)
Block this crawler
robots.txt — disallow SMTBot:
User-agent: SMTBot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} SMTBot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "SMTBot") {
return 403;
}
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