diff --git a/addons/account/wizard/account_move_send.py b/addons/account/wizard/account_move_send.py
index 0661de1d9a8..00366a13c48 100644
--- a/addons/account/wizard/account_move_send.py
+++ b/addons/account/wizard/account_move_send.py
@@ -501,7 +501,7 @@ class AccountMoveSend(models.TransientModel):
     def _send_mails(self, moves_data):
         subtype = self.env.ref('mail.mt_comment')
 
-        for move, move_data in moves_data.items():
+        for move, move_data in [(move, move_data) for move, move_data in moves_data.items() if move.partner_id.email]:
             mail_template = move_data['mail_template_id']
             mail_lang = move_data['mail_lang']
             mail_params = self._get_mail_params(move, move_data)
@@ -659,7 +659,7 @@ class AccountMoveSend(models.TransientModel):
             self._generate_invoice_fallback_documents(errors)
 
         # Send mail.
-        success = {move: move_data for move, move_data in moves_data.items() if not move_data.get('error') and move.partner_id.email}
+        success = {move: move_data for move, move_data in moves_data.items() if not move_data.get('error')}
         if success:
             self._hook_if_success(success, from_cron=from_cron, allow_fallback_pdf=allow_fallback_pdf)
 
diff --git a/addons/snailmail_account/tests/__init__.py b/addons/snailmail_account/tests/__init__.py
index b81c3a2d614..b7f7b9f9004 100644
--- a/addons/snailmail_account/tests/__init__.py
+++ b/addons/snailmail_account/tests/__init__.py
@@ -1 +1,2 @@
 from . import test_pingen_send
+from . import test_snailmail_on_invoice
diff --git a/addons/snailmail_account/tests/test_snailmail_on_invoice.py b/addons/snailmail_account/tests/test_snailmail_on_invoice.py
new file mode 100644
index 00000000000..9b2f9979737
--- /dev/null
+++ b/addons/snailmail_account/tests/test_snailmail_on_invoice.py
@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+from odoo.tests import TransactionCase, tagged
+from odoo import Command
+
+@tagged('post_install', '-at_install')
+class TestSnailmailOnInvoice(TransactionCase):
+    def test_snailmail_on_invoice_for_partner_without_email(self):
+        """"
+        Checks that a snailmail letter is created when one print and send by post a customer invoice
+        for a partner without email.
+        """
+
+        partner_without_email = self.env['res.partner'].create({
+            'name': 'Partner_without_email',
+            'email': False,
+        })
+
+        product = self.env['product.product'].create({
+            'name': 'product',
+            'sale_ok': True,
+            'standard_price': 100.0,
+        })
+
+        invoice = self.env['account.move'].create({
+            'move_type': 'out_invoice',
+            'partner_id': partner_without_email.id,
+            'invoice_date': '2019-01-01',
+            'invoice_line_ids': [Command.create({'product_id': product.id})],
+        })
+        invoice.action_post()
+
+        print_wiz = self.env['account.move.send'].create({
+            'move_ids': invoice.ids,
+            'checkbox_download': False,
+            'checkbox_send_mail': False,
+            'checkbox_send_by_post': True,
+        })
+        print_wiz.action_send_and_print()
+
+        letter = self.env['snailmail.letter'].search([
+            ('partner_id', '=', partner_without_email.id),
+            ('model', '=', invoice._name),
+            ('res_id', '=', invoice.id),
+        ], limit=1)
+        self.assertTrue(letter)