diff --git a/addons/auth_signup/data/mail_template_data.xml b/addons/auth_signup/data/mail_template_data.xml
index 79ff8ee3467..ba5c3768499 100644
--- a/addons/auth_signup/data/mail_template_data.xml
+++ b/addons/auth_signup/data/mail_template_data.xml
@@ -9,8 +9,8 @@
             <field name="email_from">"{{ object.company_id.name }}" &lt;{{ (object.company_id.email or user.email) }}&gt;</field>
             <field name="email_to">{{ object.email_formatted }}</field>
             <field name="body_html" type="html">
-<table border="0" cellpadding="0" cellspacing="0" style="padding-top: 16px; background-color: #F1F1F1; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
-<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: white; color: #454748; border-collapse:separate;">
+<table border="0" cellpadding="0" cellspacing="0" style="padding-top: 16px; background-color: #FFFFFF; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
+<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: #FFFFFF; color: #454748; border-collapse:separate;">
 <tbody>
     <!-- HEADER -->
     <tr>
@@ -104,8 +104,8 @@
             <field name="email_from">"{{ object.company_id.name }}" &lt;{{ (object.company_id.email or user.email) }}&gt;</field>
             <field name="email_to">{{ object.email_formatted }}</field>
             <field name="body_html" type="html">
-<table border="0" cellpadding="0" cellspacing="0" style="padding-top: 16px; background-color: #F1F1F1; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
-<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: white; color: #454748; border-collapse:separate;">
+<table border="0" cellpadding="0" cellspacing="0" style="padding-top: 16px; background-color: #FFFFFF; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
+<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: #FFFFFF; color: #454748; border-collapse:separate;">
 <tbody>
     <!-- HEADER -->
     <tr>
@@ -199,8 +199,8 @@
             <field name="email_from">{{ object.company_id.partner_id.email_formatted }}</field>
             <field name="email_to">{{ object.email_formatted }}</field>
             <field name="body_html" type="html">
-<table border="0" cellpadding="0" cellspacing="0" style="background-color: #F1F1F1; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
-<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: white; color: #454748; border-collapse:separate;">
+<table border="0" cellpadding="0" cellspacing="0" style="background-color: #FFFFFF; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
+<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: #FFFFFF; color: #454748; border-collapse:separate;">
 <tbody>
     <!-- CONTENT -->
     <tr>
@@ -250,8 +250,8 @@
             <field name="email_from">"{{ object.company_id.name }}" &lt;{{ (object.company_id.email or user.email) }}&gt;</field>
             <field name="email_to">{{ object.email_formatted }}</field>
             <field name="body_html" type="html">
-<table border="0" cellpadding="0" cellspacing="0" style="padding-top: 16px; background-color: #F1F1F1; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
-<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: white; color: #454748; border-collapse:separate;">
+<table border="0" cellpadding="0" cellspacing="0" style="padding-top: 16px; background-color: #FFFFFF; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
+<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: #FFFFFF; color: #454748; border-collapse:separate;">
 <tbody>
     <!-- HEADER -->
     <tr>