drop mailparse from the public docs

src/header/headers.rs

@@ -310,7 +310,7 @@ pub(crate) fn build_headers<'a, H: Header<'a>>(
 ///
 /// # Errors
 ///
-/// [`CowMailError::Parse`] when [`mailparse::parse_headers`] rejects the block.
+/// [`CowMailError::Parse`] when the block is malformed.
 ///
 /// # Examples
 ///

src/header/mod.rs

@@ -191,7 +191,7 @@ pub trait Header<'a>: Clone + Display {
     ///
     /// The whole value is rewritten, which has two visible consequences: the parameters come back
     /// in alphabetical order, and the mimetype is lowercased — both because the value round-trips
-    /// through [`mailparse::parse_content_type`]. Parameter values are always quoted.
+    /// through the parser. Parameter values are always quoted.
     ///
     /// # Panics
     ///
@@ -422,7 +422,7 @@ fn build_header<'a, H: Header<'a>>(
 ///
 /// # Errors
 ///
-/// [`CowMailError::Parse`] when [`mailparse::parse_header`] rejects the line.
+/// [`CowMailError::Parse`] when the line is not a header.
 ///
 /// # Examples
 ///

src/lib.rs

@@ -1620,14 +1620,14 @@ impl std::io::Read for CowMailReader<'_> {
 /// Generic over the header representation; [`CowMail::try_from`] is the same thing fixed to
 /// [`CowHeader`] and is the usual way in.
 ///
-/// The MIME structure is decided by [`mailparse::parse_mail`] — boundary matching,
-/// `multipart/digest` propagation, and its limit on nesting depth. What this adds is the
-/// separators mailparse discards, which is what makes [`CowMail::serialize`] byte-exact.
+/// The MIME structure — boundary matching, `multipart/digest` propagation, the limit on nesting
+/// depth — is decided by the parser the crate uses internally. What this adds is the separators
+/// that parser discards, which is what makes [`CowMail::serialize`] byte-exact.
 ///
 /// # Errors
 ///
-/// [`CowMailError::Parse`] when mailparse rejects the message; the other variants signal
-/// a broken invariant of the bridge to mailparse and should not occur.
+/// [`CowMailError::Parse`] when the message is malformed; the other variants signal a broken
+/// invariant of the bridge to the parser and should not occur.
 ///
 /// # Examples
 ///