Como enviar e-mail usando Oracle 10g Forms

Eu uso este procedimento geral para enviar e-mails. Ele também suporta anexos (somente texto simples) e os e-mails não estão limitados a 32.767 caracteres.

Se você não precisa de anexos, não deve ser problema para você removê-los.

PRIORITY_HIGH           CONSTANT INTEGER := 1;
PRIORITY_NORMAL         CONSTANT INTEGER := 3;
PRIORITY_LOW            CONSTANT INTEGER := 5;


PROCEDURE SendMail(
    Subject IN VARCHAR2, 
    Message IN OUT CLOB, 
    ToMail IN VARCHAR2,   
    FromMail IN VARCHAR2, FromName IN VARCHAR2,
    Attachment IN OUT CLOB, FileName IN VARCHAR2,
    Priority IN INTEGER DEFAULT PRIORITY_NORMAL) IS

    MIME_BOUNDARY   CONSTANT VARCHAR2(50) := '====Multipart.Boundary.689464861147414354====';
    MIME_MIXED      CONSTANT VARCHAR2(50) := 'multipart/mixed;';
    MIME_TEXT       CONSTANT VARCHAR2(50) := 'text/plain;';
    MIME_HTML       CONSTANT VARCHAR2(50) := 'text/html;';  
    MAIL_HOST       CONSTANT VARCHAR2(50) := '192.168.0.6'; -- try also 'mailhost'

    con UTL_SMTP.connection;
    ret UTL_SMTP.reply;
    Charset VARCHAR2(20);
    Footer VARCHAR2(1000);

    ClobLen PLS_INTEGER;
    amount BINARY_INTEGER := 8192;
    buffer VARCHAR2(16384);
    offset PLS_INTEGER := 1;
    isHTML BOOLEAN := REGEXP_LIKE(DBMS_LOB.SUBSTR(Message, 1000, 1), '<(html)|(body)', 'i');

BEGIN

    SELECT UTL_I18N.MAP_CHARSET(VALUE)
    INTO Charset
    FROM V$NLS_PARAMETERS
    WHERE PARAMETER = 'NLS_CHARACTERSET';

    -- setup mail header
    con := UTL_SMTP.OPEN_CONNECTION(MAIL_HOST, 25);
    ret := UTL_SMTP.helo(con, SYS_CONTEXT('USERENV', 'DB_DOMAIN')); -- assuming your database is in the same domain as your mail server
    ret := UTL_SMTP.Mail(con, FromMail);
    ret := UTL_SMTP.rcpt(con, ToMail);
    -- simply call "UTL_SMTP.rcpt(con, ...);" again in order to add further recipient
    ret := UTL_SMTP.open_data(con);

    IF FromName IS NOT NULL THEN
        UTL_SMTP.write_data(con, 'From: "'||FromName||'" <'||FromMail||'>'||Utl_Tcp.CRLF);
    ELSE
        UTL_SMTP.write_data(con, 'From: <'||FromMail||'>'||Utl_Tcp.CRLF);
    END IF;
    UTL_SMTP.write_data(con, 'To: <'||ToMail||'>'||Utl_Tcp.CRLF);
    --  UTL_SMTP.write_data(con, 'Cc: <'||CcMail||'>'||Utl_Tcp.CRLF);       
    UTL_SMTP.write_data(con, 'Subject: '||Subject||Utl_Tcp.CRLF);
    UTL_SMTP.write_data(con, 'X-Priority: '||Priority||Utl_Tcp.CRLF);

    IF Attachment IS NOT NULL AND FileName IS NOT NULL THEN
        UTL_SMTP.write_data(con, 'Mime-Version: 1.0' || Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, 'Content-Type: '||MIME_MIXED||' boundary="'||MIME_BOUNDARY||'"' || Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, 'This is a multipart message in MIME format.' || Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, '--'||MIME_BOUNDARY || Utl_Tcp.CRLF);
    END IF;

    Footer := 'Message from '||SYS_CONTEXT('USERENV', 'DB_NAME')||' sent at '||TO_CHAR(SYSDATE,'yyyy-mm-dd hh24:mi:ss');
    IF isHTML THEN
        UTL_SMTP.write_data(con, 'Content-type: '||MIME_HTML||' charset='||Charset || Utl_Tcp.CRLF);
        Message := REPLACE(message, '</body>', '<p>'||Footer||'</p></body>');
    ELSE 
        UTL_SMTP.write_data(con, 'Content-type: '||MIME_TEXT||' charset='||Charset || Utl_Tcp.CRLF);
    END IF;

    -- Mail Body
    UTL_SMTP.write_data(con, Utl_Tcp.CRLF);
    ClobLen := DBMS_LOB.GETLENGTH(Message);
    LOOP
        EXIT WHEN offset > ClobLen;
        DBMS_LOB.READ(Message, amount, offset, BUFFER);
        UTL_SMTP.write_raw_data(con, UTL_RAW.cast_to_raw(BUFFER));
        offset := offset + amount;
    END LOOP;   
    UTL_SMTP.write_data(con, Utl_Tcp.CRLF);
    IF NOT isHTML THEN
        UTL_SMTP.write_data(con, Utl_Tcp.CRLF || Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, Footer);
        UTL_SMTP.write_data(con, Utl_Tcp.CRLF);
    END IF;

    IF Attachment IS NOT NULL AND FileName IS NOT NULL THEN
        -- Mail Attachment
        UTL_SMTP.write_data(con, Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, '--'||MIME_BOUNDARY || Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, 'Content-Type: '||MIME_TEXT||' name="'||Filename||'"'|| Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, 'Content-Disposition: attachment; filename="'||Filename||'"'|| Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, Utl_Tcp.CRLF);

        offset := 1;
        ClobLen := DBMS_LOB.GETLENGTH(Attachment);
        LOOP
            EXIT WHEN offset > ClobLen;
            DBMS_LOB.READ(Attachment, amount, offset, BUFFER);
            UTL_SMTP.write_raw_data(con, Utl_Raw.cast_to_raw(BUFFER));
            offset := offset + amount;
        END LOOP;
        UTL_SMTP.write_data(con, Utl_Tcp.CRLF);
        UTL_SMTP.write_data(con, '--'||MIME_BOUNDARY||'--' || Utl_Tcp.CRLF);
    END IF;

    -- finish mail
    ret := UTL_SMTP.close_data(con);
    ret := UTL_SMTP.quit(con);

EXCEPTION
    WHEN UTL_SMTP.TRANSIENT_ERROR OR UTL_SMTP.PERMANENT_ERROR THEN
        UTL_SMTP.quit(con);
        RAISE;
END SendMail;

Apenas uma observação, não perca o UTL_SMTP.write_data(con, UTL_TCP.CRLF) linhas. Eles parecem redundantes, no entanto, a maioria deles é necessária! Também mensagem de cortesia como "Esta é uma mensagem de várias partes no formato MIME". é necessário para a exibição adequada de seu e-mail em caso de anexos.

Se você ainda tiver problemas, faça um dbms_output.put_line(ret.code||': '||ret.text); após cada chamada de função em UTL_SMTP.

Aqui o mesmo procedimento, mas reduzido às suas necessidades:

FUNCTION SendMail(
    Subject IN VARCHAR2, 
    Message IN VARCHAR2, 
    FromMail IN VARCHAR2, FromName IN VARCHAR2, 
    ToMail IN VARCHAR2) RETURN VARCHAR2 IS

    MIME_TEXT       CONSTANT VARCHAR2(50) := 'text/plain;';
    MIME_HTML       CONSTANT VARCHAR2(50) := 'text/html;';  
    MAIL_HOST       CONSTANT VARCHAR2(50) := '192.168.0.6'; -- try also 'mailhost'

    con UTL_SMTP.connection;
    ret UTL_SMTP.reply;
    Charset VARCHAR2(20);
    isHTML BOOLEAN := REGEXP_LIKE(DBMS_LOB.SUBSTR(Message, 1000, 1), '<(html)|(body)', 'i');

BEGIN

    SELECT UTL_I18N.MAP_CHARSET(VALUE)
    INTO Charset
    FROM V$NLS_PARAMETERS
    WHERE PARAMETER = 'NLS_CHARACTERSET';

    -- setup mail header
    con := UTL_SMTP.OPEN_CONNECTION(MAIL_HOST, 25);
    ret := UTL_SMTP.helo(con, SYS_CONTEXT('USERENV', 'DB_DOMAIN')); -- assuming your database is in the same domain as your mail server
    ret := UTL_SMTP.Mail(con, FromMail);
    ret := UTL_SMTP.rcpt(con, ToMail);
    ret := UTL_SMTP.open_data(con);

    UTL_SMTP.write_data(con, 'From: "'||FromName||'" <'||FromMail||'>'||Utl_Tcp.CRLF);
    UTL_SMTP.write_data(con, 'To: <'||ToMail||'>'||Utl_Tcp.CRLF);
    UTL_SMTP.write_data(con, 'Subject: '||Subject||Utl_Tcp.CRLF);
    UTL_SMTP.write_data(con, 'X-Priority: 3'||Utl_Tcp.CRLF);

    IF isHTML THEN
        UTL_SMTP.write_data(con, 'Content-type: '||MIME_HTML||' charset='||Charset || Utl_Tcp.CRLF);
    ELSE 
        UTL_SMTP.write_data(con, 'Content-type: '||MIME_TEXT||' charset='||Charset || Utl_Tcp.CRLF);
    END IF;

    -- Mail Body
    UTL_SMTP.write_data(con, Utl_Tcp.CRLF);
    UTL_SMTP.write_raw_data(con, UTL_RAW.cast_to_raw(Message));
    UTL_SMTP.write_data(con, Utl_Tcp.CRLF);

    -- finish mail
    ret := UTL_SMTP.close_data(con);
    ret := UTL_SMTP.quit(con);
    RETURN '0';    
EXCEPTION
    WHEN UTL_SMTP.TRANSIENT_ERROR OR UTL_SMTP.PERMANENT_ERROR THEN
        UTL_SMTP.quit(con);
        RETURN SQLERRM;
END SendMail;