Aggiunge IMAP bounce e flag email non valide nel CRM.

Permette di leggere i bounce dalla stessa MailIdentity SMTP, aggiornare le email in anagrafica e saltare gli indirizzi invalidi nei mailing.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/models/mail_identity.rb

@@ -9,15 +9,30 @@ class MailIdentity < ApplicationRecord
 
   ENCRYPTIONS = Catalog::MAIL_ENCRYPTIONS.keys.freeze
 
+  # Mapping host SMTP → IMAP tipici dei provider usati in produzione.
+  IMAP_HOST_HINTS = {
+    "aruba.it" => "imaps.aruba.it",
+    "smtps.aruba.it" => "imaps.aruba.it",
+    "smtp.aruba.it" => "imaps.aruba.it",
+    "gmail.com" => "imap.gmail.com",
+    "smtp.gmail.com" => "imap.gmail.com",
+    "outlook.com" => "outlook.office365.com",
+    "smtp.office365.com" => "outlook.office365.com"
+  }.freeze
+
   validates :name, :from_name, :from_email, :smtp_host, :smtp_port, presence: true
   validates :from_email, format: { with: URI::MailTo::EMAIL_REGEXP }
   validates :reply_to, format: { with: URI::MailTo::EMAIL_REGEXP }, allow_blank: true
   validates :smtp_port, numericality: { in: 1..65535 }
+  validates :imap_port, numericality: { in: 1..65535 }, allow_nil: true
   validates :encryption, inclusion: { in: ENCRYPTIONS }
   validates :smtp_authentication, inclusion: { in: Catalog::MAIL_AUTH_METHODS.keys }
   validate :encryption_matches_port
 
+  before_validation :apply_imap_defaults
+
   scope :active, -> { where(active: true) }
+  scope :imap_enabled, -> { where(imap_enabled: true) }
   scope :ordered, -> { order(:name) }
 
   def from_header
@@ -42,8 +57,56 @@ class MailIdentity < ApplicationRecord
     settings
   end
 
+  def imap_username
+    smtp_username.presence || from_email
+  end
+
+  def effective_imap_host
+    imap_host.presence || inferred_imap_host
+  end
+
+  def effective_imap_port
+    (imap_port.presence || 993).to_i
+  end
+
+  def imap_ready?
+    imap_enabled? && effective_imap_host.present? && effective_imap_port.positive?
+  end
+
+  def imap_settings
+    {
+      address: effective_imap_host,
+      port: effective_imap_port,
+      ssl: true,
+      user_name: imap_username,
+      password: smtp_password
+    }
+  end
+
+  def inferred_imap_host
+    host = smtp_host.to_s.downcase.strip
+    return if host.blank?
+
+    IMAP_HOST_HINTS.each do |needle, imap|
+      return imap if host == needle || host.end_with?(".#{needle}") || host.include?(needle)
+    end
+
+    # Fallback generico: smtp.X → imap.X, smtps.X → imaps.X
+    if host.start_with?("smtps.")
+      host.sub(/\Asmtps\./, "imaps.")
+    elsif host.start_with?("smtp.")
+      host.sub(/\Asmtp\./, "imap.")
+    end
+  end
+
   private
 
+  def apply_imap_defaults
+    self.imap_port = 993 if imap_port.blank?
+    self.imap_enabled = true if imap_enabled.nil?
+    self.imap_host = inferred_imap_host if imap_host.blank? && inferred_imap_host.present?
+  end
+
   def encryption_matches_port
     return if smtp_port.blank? || encryption.blank?