use Proton Mail instead of Protonmail (#1336)

docs/enforce-spf.md

@@ -1,4 +1,4 @@
-Some email services like Gmail, Protonmail, etc don't have a strict SPF record (`-all`) to support the "classic" email forwarding
+Some email services like Gmail, Proton Mail, etc don't have a strict SPF record (`-all`) to support the "classic" email forwarding
 that is usually used for group mailing list. In this scenario, an email is sent to a group is forwarded as-is,
 breaking therefore the SPF.
 

templates/emails/com/newsletter/mailbox.html

@@ -11,7 +11,7 @@
   <img src="https://simplelogin.io/blog/mailbox-gmail.png"
        alt="Mailbox Gmail">
   <img src="https://simplelogin.io/blog/mailbox-protonmail.png"
-       alt="Mailbox Protonmail">
+       alt="Mailbox Proton Mail">
   {{ render_text("When creating an alias, you can choose which mailbox that <b>owns</b> this alias, meaning:") }}
   {{ render_text("1. Emails sent to this alias are *forwarded* to the owning mailbox.") }}
   {{ render_text("2. The owning mailbox can *send* or reply emails from this alias.") }}

templates/emails/com/onboarding/mailbox.html

@@ -7,7 +7,7 @@
 {% endcall %}
 
 {% call text() %}
-If you have several email inboxes, say Gmail and ProtonMail,
+If you have several email inboxes, say Gmail and Proton Mail,
 you can add them into SimpleLogin as <b>mailboxes</b>.
 {% endcall %}
 

templates/emails/com/onboarding/mailbox.txt

@@ -4,7 +4,7 @@ Unsubscribe from our emails on {{URL}}/dashboard/setting#notification
 
 Hi
 
-If you have several email addresses, e.g. Gmail for work and Protonmail for personal stuffs, you can add them into SimpleLogin and create aliases for them.
+If you have several email addresses, e.g. Gmail for work and Proton Mail for personal stuffs, you can add them into SimpleLogin and create aliases for them.
 
 A (real) email address is called *mailbox* in SimpleLogin.