diff --git a/src/GenericParser/EmailAddress.purs b/src/GenericParser/EmailAddress.purs
index 42705d9..05d9230 100644
--- a/src/GenericParser/EmailAddress.purs
+++ b/src/GenericParser/EmailAddress.purs
@@ -43,7 +43,7 @@ fws = do _ <- tryMaybe do _ <- A.many wsp
          void $ many1 wsp
        <|> obs_fws
 
--- | ctext: printable US-ASCII characters.
+-- | ctext: comment text, meaning printable US-ASCII characters excluding '(', ')' and '\'.
 -- |
 -- | ctext           =   %d33-39 /          ; Printable US-ASCII
 -- |                     %d42-91 /          ;  characters not including
@@ -79,9 +79,13 @@ comment = do _ <- char '('
                              void ccontent)
              void $ char ')'
 
--- CFWS            =   (1*([FWS] comment) [FWS]) / FWS
---cfws :: forall e. Parser e String
---cfws = do
+-- | CFWS: comment folding white space.
+-- |
+-- | CFWS            =   (1*([FWS] comment) [FWS]) / FWS
+cfws :: forall e. Parser e Unit
+cfws = do void $ many1 $ do _ <- tryMaybe fws
+                            comment
+        <|> fws
 
 -- address         =   mailbox / group
 --address :: forall e. Parser e String
@@ -112,10 +116,12 @@ comment = do _ <- char '('
 -- domain          =   dot-atom / domain-literal / obs-domain
 --
 -- domain-literal  =   [CFWS] "[" *([FWS] dtext) [FWS] "]" [CFWS]
---
--- dtext           =   %d33-90 /          ; Printable US-ASCII
---                     %d94-126 /         ;  characters not including
---                     obs-dtext          ;  "[", "]", or "\"
+
+-- | dtext: characters in domains.
+-- |
+-- | dtext           =   %d33-90 /          ; Printable US-ASCII
+-- |                     %d94-126 /         ;  characters not including
+-- |                     obs-dtext          ;  "[", "]", or "\"
 dtext :: forall e. Parser e Char
 dtext = sat cond <|> obs_dtext
   where cond x = let charcode = C.toCharCode x
@@ -144,11 +150,14 @@ dtext = sat cond <|> obs_dtext
 obs_dtext :: forall e. Parser e Char
 obs_dtext = obs_no_ws_ctl <|> quoted_pair
 
---obs-NO-WS-CTL   =   %d1-8 /            ; US-ASCII control
---                    %d11 /             ;  characters that do not
---                    %d12 /             ;  include the carriage
---                    %d14-31 /          ;  return, line feed, and
---                    %d127              ;  white space characters
+-- | obs-NO-WS-CTL: US-ASCII control characters without carriage return,
+-- | line feed and white space characters.
+-- |
+-- | obs-NO-WS-CTL   =   %d1-8 /            ; US-ASCII control
+-- |                     %d11 /             ;  characters that do not
+-- |                     %d12 /             ;  include the carriage
+-- |                     %d14-31 /          ;  return, line feed, and
+-- |                     %d127              ;  white space characters
 obs_no_ws_ctl :: forall e. Parser e Char
 obs_no_ws_ctl = sat cond
   where cond x = let charcode = C.toCharCode x
@@ -157,6 +166,8 @@ obs_no_ws_ctl = sat cond
                    || between 14 31 charcode
                    || charcode == 127
 
+-- | obs-ctext: obsolete comment text.
+-- |
 -- | obs-ctext       =   obs-NO-WS-CTL
 obs_ctext :: forall e. Parser e Char
 obs_ctext = obs_no_ws_ctl