diff --git a/app/builders/email/base_builder.rb b/app/builders/email/base_builder.rb
index 6f79d6018..a6da58792 100644
--- a/app/builders/email/base_builder.rb
+++ b/app/builders/email/base_builder.rb
@@ -41,7 +41,7 @@ class Email::BaseBuilder
   end
 
   def business_name
-    inbox.business_name || inbox.sanitized_name
+    inbox.sanitized_business_name
   end
 
   def account_support_email
diff --git a/app/mailers/conversation_reply_mailer.rb b/app/mailers/conversation_reply_mailer.rb
index d9e6ec8e0..20e194fed 100644
--- a/app/mailers/conversation_reply_mailer.rb
+++ b/app/mailers/conversation_reply_mailer.rb
@@ -105,7 +105,7 @@ class ConversationReplyMailer < ApplicationMailer
   end
 
   def business_name
-    @inbox.business_name || @inbox.sanitized_name
+    @inbox.sanitized_business_name
   end
 
   def from_email
diff --git a/app/models/inbox.rb b/app/models/inbox.rb
index 0a26462ad..82b250560 100644
--- a/app/models/inbox.rb
+++ b/app/models/inbox.rb
@@ -102,7 +102,7 @@ class Inbox < ApplicationRecord
 
   # Sanitizes inbox name for balanced email provider compatibility
   # ALLOWS: /'._- and Unicode letters/numbers/emojis
-  # REMOVES: Forbidden chars (\<>@") + spam-trigger symbols (!#$%&*+=?^`{|}~)
+  # REMOVES: Forbidden chars (\<>@"()) + spam-trigger symbols (!#$%&*+=?^`{|}~)
   def sanitized_name
     return default_name_for_blank_name if name.blank?
 
@@ -110,6 +110,10 @@ class Inbox < ApplicationRecord
     sanitized.blank? && email? ? display_name_from_email : sanitized
   end
 
+  def sanitized_business_name
+    sanitize_raw_name(business_name) || sanitized_name
+  end
+
   def sms?
     channel_type == 'Channel::Sms'
   end
@@ -209,8 +213,15 @@ class Inbox < ApplicationRecord
     email? ? display_name_from_email : ''
   end
 
+  def sanitize_raw_name(raw)
+    return nil if raw.blank?
+
+    result = apply_sanitization_rules(raw)
+    result.presence
+  end
+
   def apply_sanitization_rules(name)
-    name.gsub(/[\\<>@"!#$%&*+=?^`{|}~:;]/, '')         # Remove forbidden chars
+    name.gsub(/[\\<>@"!#$%&*+=?^`{|}~:;()]/, '')        # Remove forbidden chars
         .gsub(/[\x00-\x1F\x7F]/, ' ')                   # Replace control chars with spaces
         .gsub(/\A[[:punct:]]+|[[:punct:]]+\z/, '')      # Remove leading/trailing punctuation
         .gsub(/\s+/, ' ')                               # Normalize spaces