old_contents: # Copyright 2019 Komit <https://komit-consulting.com>
  # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
  
  import logging
  from odoo import api, models, _
  from odoo.exceptions import UserError
  
  _logger = logging.getLogger(__name__)
  
  try:
      from validate_email import validate_email
  except ImportError:
      _logger.error('Cannot import "validate_email".')
  
      def validate_email(email):
          _logger.warning(
              'Can not validate email, '
              'python dependency required "validate_email"')
          return True
  
  
  class ResPartner(models.Model):
      _inherit = 'res.partner'
  
      @api.constrains('email')
      def constrains_email(self):
          for rec in self.filtered("email"):
              self.email_check(rec.email)
  
      @api.model
      def email_check(self, email):
          if validate_email(email):
              return True
          raise UserError(_('Invalid e-mail!'))
  
new_contents: # Copyright 2019 Komit <https://komit-consulting.com>
  # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
  
  import logging
  from odoo import api, models, _
  from odoo.exceptions import UserError
  
  _logger = logging.getLogger(__name__)
  
  try:
      from validate_email import validate_email
  except ImportError:
      _logger.debug('Cannot import "validate_email".')
  
      def validate_email(email):
          _logger.warning(
              'Can not validate email, '
              'python dependency required "validate_email"')
          return True
  
  
  class ResPartner(models.Model):
      _inherit = 'res.partner'
  
      @api.constrains('email')
      def constrains_email(self):
          for rec in self.filtered("email"):
              self.email_check(rec.email)
  
      @api.model
      def email_check(self, email):
          if validate_email(email):
              return True
          raise UserError(_('Invalid e-mail!'))
  
subject: Make debugger record a debug message instead of error when importing validate_email in partner_email_check