Seguinte criei uma rotina de enviar e-mail, quando faço os testes na minha maquina enviando o e-mail para mim mesmo da certo, a partir do momento que coloco em produção e o usuário tenta mandar o e-mail, da erro. alguém poderia me dar uma ajuda? segue a foto do erro

as rotinas criadas para enviar e-mail:
PROCEDURE envia_email_html(p_to in varchar2,
p_from in varchar2,
p_subject in varchar2,
p_text in varchar2,
p_html in varchar2)
IS
texto varchar2(32000);
begin
texto :=
' DECLARE
p_to VARCHAR2(200) := '''||P_to||''';
p_from varchar2(200) := '''||p_from||''';
p_subject VARCHAR2(100) := '''||p_subject||''';
p_text VARCHAR2(4000):= '''||p_text||''';
p_html VARCHAR2(4000):= '''||p_html||''';
p_smtp_hostname VARCHAR2(200):=''correio.trt9.jus.br'';
l_boundary varchar2(255) default ''a1b2c3d4e3f2g1'';
l_connection utl_smtp.connection;
l_body_html clob := empty_clob;
l_offset number;
l_ammount number;
l_temp varchar2(32767) default null;
begin
l_connection := utl_smtp.open_connection(''10.1.2.40'');
utl_smtp.helo( l_connection, p_smtp_hostname );
utl_smtp.mail( l_connection, p_from );
utl_smtp.rcpt( l_connection, p_to );
l_temp := l_temp || ''MIME-Version: 1.0'' || chr(13) || chr(10);
l_temp := l_temp || ''To: '' || p_to || chr(13) || chr(10);
l_temp := l_temp || ''From: '' || p_from || chr(13) || chr(10);
l_temp := l_temp || ''Subject: '' || p_subject || chr(13) || chr(10);
l_temp := l_temp || ''Reply-To: '' || p_from || chr(13) || chr(10);
l_temp := l_temp || ''Content-Type: multipart/alternative; boundary='' ||
chr(34) || l_boundary || chr(34) || chr(13) ||
chr(10);
dbms_lob.createtemporary( l_body_html, false, 10 );
dbms_lob.write(l_body_html,length(l_temp),1,l_temp);
l_offset := dbms_lob.getlength(l_body_html) + 1;
l_temp := ''--'' || l_boundary || chr(13)||chr(10);
l_temp := l_temp || ''content-type: text/plain; charset=us-ascii'' ||
chr(13) || chr(10) || chr(13) || chr(10);
dbms_lob.write(l_body_html,length(l_temp),l_offset,l_temp);
l_offset := dbms_lob.getlength(l_body_html) + 1;
dbms_lob.write(l_body_html,length(p_text),l_offset,p_text);
l_temp := chr(13)||chr(10)||chr(13)||chr(10)||''--'' || l_boundary ||
chr(13) || chr(10);
l_temp := l_temp || ''content-type: text/html;'' ||
chr(13) || chr(10) || chr(13) || chr(10);
l_offset := dbms_lob.getlength(l_body_html) + 1;
dbms_lob.write(l_body_html,length(l_temp),l_offset,l_temp);
l_offset := dbms_lob.getlength(l_body_html) + 1;
dbms_lob.write(l_body_html,length(p_html),l_offset,p_html);
l_temp := chr(13) || chr(10) || ''--'' || l_boundary || ''--'' || chr(13);
l_offset := dbms_lob.getlength(l_body_html) + 1;
dbms_lob.write(l_body_html,length(l_temp),l_offset,l_temp);
l_offset := 1;
l_ammount := 1900;
utl_smtp.open_data(l_connection);
while l_offset < dbms_lob.getlength(l_body_html) loop
utl_smtp.write_data(l_connection,
dbms_lob.substr(l_body_html,l_ammount,l_offset));
l_offset := l_offset + l_ammount ;
l_ammount := least(1900,dbms_lob.getlength(l_body_html) - l_ammount);
end loop;
utl_smtp.close_data(l_connection);
utl_smtp.quit( l_connection );
dbms_lob.freetemporary(l_body_html);
end;
';
FORMS_DDL (TEXTO);
IF not Form_Success THEN
ERRO(Dbms_Error_Code||'-'||DBMS_ERROR_TEXT );
END IF;
END;