Mail problem with long titles using utl_smtp / mixed content / attachements

Question

Hello,
I'm having a problem with sending emails. The title as well as the body needs to be able to contain accented letters (é ç ...).
For the body i got it working.
And the title works fine too, untill the encoding passes a certain length, then goes all wrong and my mail header starts showing up in the mail body.
Could anyone help me in finding a solution?
Thanks in advance
Below my code:
DECLARE
   v_From       VARCHAR2(80) := 'test@localhost';
   v_Recipient  VARCHAR2(80) := 'test@localhost';
   v_Cc         VARCHAR2(80);
-- long subject causing problems
   v_Subject    VARCHAR2(32000) := '123456789111111111111111111111118888888888888111111111111111991234567891111111111111111111111188888888888881111111111111119912345678911111111111111111111111888888888888811111111111111199';
   v_body       VARCHAR2(32000) := '<a href="#">tester</a><br><br>en nog wat éékes en ççkes';
   v_Mail_Host  VARCHAR2(30) := 'localhost';
   v_Mail_Conn  utl_smtp.Connection;
   crlf         VARCHAR2(2)  := chr(13)||chr(10);
BEGIN
  v_Mail_Conn := utl_smtp.Open_Connection(v_Mail_Host, 25);
  utl_smtp.Helo(v_Mail_Conn, v_Mail_Host);
  utl_smtp.Mail(v_Mail_Conn, v_From);
  utl_smtp.Rcpt(v_Mail_Conn, v_Recipient);
  utl_smtp.Data(v_Mail_Conn,
-- write header
    'Date: '   || to_char(sysdate, 'Dy, DD Mon YYYY hh24:mi:ss') || crlf ||
    'From: '   || v_From || crlf ||
    'Subject: ' || utl_encode.MIMEHEADER_ENCODE(v_Subject) || crlf ||
    'To: '     || v_Recipient || crlf ||
    'Cc: '     ||  v_Cc || crlf ||
    'X-Mailer: Mailer by Oracle UTL_SMTP' || crlf ||
    'X-Priority: 1' || crlf ||
    'MIME-Version: 1.0'|| crlf ||       -- Use MIME mail standard
    'Content-Type: multipart/mixed;'|| crlf ||
    ' boundary="-----SECBOUND"'|| crlf ||
    crlf ||
-- add message body
    '-------SECBOUND'|| crlf ||
    'Content-type: text/html; charset=UTF-8'|| crlf ||
    'Content-Transfer-Encoding: base64'|| crlf ||
    crlf ||
    utl_raw.cast_to_varchar2(utl_encode.base64_encode(utl_raw.cast_to_raw(v_body)))||
    crlf ||
-- add csv attachment
    '-------SECBOUND'|| crlf ||
    'Content-Type: text/plain;'|| crlf ||
    ' name="excel.csv"'|| crlf ||
    'Content-Transfer_Encoding: 8bit'|| crlf ||
    'Content-Disposition: attachment;'|| crlf ||
    ' filename="excel.csv"'|| crlf ||
    crlf ||
    'CSV,file,attachement'|| crlf ||   -- Content of attachment
    crlf ||
    '-------SECBOUND--'                            -- End MIME mail
  utl_smtp.Quit(v_mail_conn);
EXCEPTION
  WHEN utl_smtp.Transient_Error OR utl_smtp.Permanent_Error then
    raise_application_error(-20000, 'Unable to send mail: '||sqlerrm);
END;
/

Answer 1

Hi,
I did not think the characterset and database would matter for this problem, but here is the info you requested.
The database is an Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
The characterset : NLS_CHARACTERSET     AL32UTF8
And i don't have a clue about the characterset of the operating system (not even sure what the operating system is), but i think that will be utf-8 aswell.
I'm not sure what i did, to come over as rude, but i didn't mean to and i apologize for it.