Remove alias parts from additional yahoo domains

Author: horgh

CHANGELOG.md

@@ -10,6 +10,10 @@
 * Fastmail alias subdomain email addresses are now normalized when
   `hash_address` is used. For example, `[email protected]` will
   become `[email protected]`.
+* Additional `yahoo.com` email addresses now have aliases removed from
+  their local part when `hash_address` is used. For example,
+  `[email protected]` will become `[email protected]` for additional
+  `yahoo.com` domains.
 
 ## v2.4.0 (2024-01-12)
 

lib/minfraud/components/email.rb

@@ -90,7 +90,7 @@ def clean_email_address(address)
 
         domain = clean_domain(domain)
 
-        if domain == 'yahoo.com'
+        if YAHOO_DOMAINS.key?(domain)
           local_part.sub!(/\A([^-]+)-.*\z/, '\1')
         else
           local_part.sub!(/\A([^+]+)\+.*\z/, '\1')
@@ -261,6 +261,63 @@ def clean_email_address(address)
       }.freeze
       private_constant :FASTMAIL_DOMAINS
 
+      YAHOO_DOMAINS = {
+        'y7mail.com'   => true,
+        'yahoo.at'     => true,
+        'yahoo.be'     => true,
+        'yahoo.bg'     => true,
+        'yahoo.ca'     => true,
+        'yahoo.cl'     => true,
+        'yahoo.co.id'  => true,
+        'yahoo.co.il'  => true,
+        'yahoo.co.in'  => true,
+        'yahoo.co.kr'  => true,
+        'yahoo.co.nz'  => true,
+        'yahoo.co.th'  => true,
+        'yahoo.co.uk'  => true,
+        'yahoo.co.za'  => true,
+        'yahoo.com'    => true,
+        'yahoo.com.ar' => true,
+        'yahoo.com.au' => true,
+        'yahoo.com.br' => true,
+        'yahoo.com.co' => true,
+        'yahoo.com.hk' => true,
+        'yahoo.com.hr' => true,
+        'yahoo.com.mx' => true,
+        'yahoo.com.my' => true,
+        'yahoo.com.pe' => true,
+        'yahoo.com.ph' => true,
+        'yahoo.com.sg' => true,
+        'yahoo.com.tr' => true,
+        'yahoo.com.tw' => true,
+        'yahoo.com.ua' => true,
+        'yahoo.com.ve' => true,
+        'yahoo.com.vn' => true,
+        'yahoo.cz'     => true,
+        'yahoo.de'     => true,
+        'yahoo.dk'     => true,
+        'yahoo.ee'     => true,
+        'yahoo.es'     => true,
+        'yahoo.fi'     => true,
+        'yahoo.fr'     => true,
+        'yahoo.gr'     => true,
+        'yahoo.hu'     => true,
+        'yahoo.ie'     => true,
+        'yahoo.in'     => true,
+        'yahoo.it'     => true,
+        'yahoo.lt'     => true,
+        'yahoo.lv'     => true,
+        'yahoo.nl'     => true,
+        'yahoo.no'     => true,
+        'yahoo.pl'     => true,
+        'yahoo.pt'     => true,
+        'yahoo.ro'     => true,
+        'yahoo.se'     => true,
+        'yahoo.sk'     => true,
+        'ymail.com'    => true,
+      }.freeze
+      private_constant :YAHOO_DOMAINS
+
       def clean_domain(domain)
         domain = domain.strip
 

spec/components/email_spec.rb

@@ -74,6 +74,7 @@
         { input: '[email protected]', output: '[email protected]' },
         { input: '[email protected]', output: '[email protected]' },
         { input: '[email protected]', output: '[email protected]' },
+        { input: '[email protected]', output: '[email protected]' },
       ]
 
       tests.each do |i|