diff --git a/src/App/DisplayErrors.purs b/src/App/DisplayErrors.purs
index c5d1a2f..01965a5 100644
--- a/src/App/DisplayErrors.purs
+++ b/src/App/DisplayErrors.purs
@@ -171,8 +171,7 @@ show_error_title_label v = case v of
 
 show_error_login :: L.Error -> String
 show_error_login = case _ of
-  L.ParsingError {error, position} ->
-    "position " <> show position <> " " <> maybe "" string_error_login error
+  L.ParsingError {error} -> maybe "" string_error_login error
 
 string_error_login :: L.LoginParsingError -> String
 string_error_login = case _ of
@@ -184,8 +183,7 @@ string_error_login = case _ of
 
 show_error_email :: E.Error -> String
 show_error_email = case _ of
-  E.ParsingError {error, position} ->
-    "position " <> show position <> " " <> maybe "" string_error_email error
+  E.ParsingError {error} -> maybe "" string_error_email error
 
 string_error_email :: E.EmailParsingError -> String
 string_error_email = case _ of
@@ -197,8 +195,7 @@ string_error_email = case _ of
 
 show_error_password :: P.Error -> String
 show_error_password = case _ of
-  P.ParsingError {error, position} ->
-    "position " <> show position <> " " <> maybe "" string_error_password error
+  P.ParsingError {error} -> maybe "" string_error_password error
 
 string_error_password :: P.PasswordParsingError -> String
 string_error_password = case _ of
diff --git a/src/App/Text/Explanations.purs b/src/App/Text/Explanations.purs
index 8d6657f..f7e879d 100644
--- a/src/App/Text/Explanations.purs
+++ b/src/App/Text/Explanations.purs
@@ -67,18 +67,22 @@ basics = HH.div_
           """
 
   , Bulma.hr
-  , Bulma.h3 "I have something to host."
-  , expl' "Let's assume you have a web server and you host your website somewhere (A and AAAA records)."
+  , Bulma.h3 "I have something to host (A and AAAA records)."
+  , expl' "Let's assume you have a web server and you host your website somewhere."
   , Bulma.p """
     You want an A (IPv4) or AAAA (IPv6) record pointing to your server, named "enigma" for example.
     """
-  , expl' "You need other names pointing to your server (CNAME records)."
+
+  , Bulma.hr
+  , Bulma.h3 "You need other names pointing to your server (CNAME records)."
   , Bulma.p """
     You may not want to use the name of your server "enigma" directly.
     Instead, you may want the usual names for your services, such as "www" or "blog".
     CNAME records are basically aliases, exactly to that end.
     """
-  , expl' "If you have other servers, just add more A or AAAA records."
+
+  , Bulma.hr
+  , Bulma.h3 "If you have other servers, just add more A or AAAA records."
   , Bulma.p """
     Tip: choose relevant names for your servers then add CNAME records.
     For example, you can have an A record named "server1" and a CNAME "www" pointing to it.
@@ -91,7 +95,7 @@ basics = HH.div_
   , Bulma.h3 "I want an email server."
   , expl' """
            Hosting a mail server is quite complex.
-           This page will focus on the main parts regarding the DNS.
+           This section will focus on the main parts regarding the DNS.
            """
   , Bulma.notification_danger' """
     The actual configuration of your mail server is complex and depends on your choice of software.
@@ -135,6 +139,12 @@ basics = HH.div_
         , Bulma.hr
         , Bulma.p """
           DMARC enables to check the "From:" field of a mail, based on the SPF and DKIM mechanisms.
+          Thus, domains with a DMARC record enable to only allow verified mails.
+          Valid emails come from an authorized IP address (SPF), are signed by the verified email server (DKIM) and have an email address coming from a verified domain (DMARC) related to the two previous spam mitigation mechanisms.
+          """
+        , Bulma.hr
+        , Bulma.p """
+          With DMARC, you won't accept an email from "hacker@example.com" because it was sent by another domain with a valid SPF and DKIM.
           """
         ]
       ]