import smtplib
from email.mime.text import MIMEText

def sendTextMail(subject, to_addrs, content):
    from_addr = 'mock@xxserver.com'
    passwd = 'psd'
    msg = MIMEText('hello, send by Python...', 'plain', 'utf-8')

    msg['Subject'] = subject
    msg['From'] = from_addr
    msg['To'] = to_addrs
    s = smtplib.SMTP_SSL("smtp.server.com", 465)
    # s = smtplib.SMTP()
    s.set_debuglevel(1)
    s.login(from_addr, passwd)
    s.sendmail(from_addr, to_addrs, msg.as_string())
    print("Success")
    s.quit()

subject = "subject 1"
to_addrs = 'to@email.com'
content = 'something'
sendTextMail(subject, to_addrs, content)

reply: b'250-smtp.aliyun-inc.comrn'
reply: b'250-8BITMIMErn'
reply: b'250-AUTH=PLAIN LOGIN XALIOAUTHrn'
reply: b'250-AUTH PLAIN LOGIN XALIOAUTHrn'
reply: b'250-PIPELININGrn'
reply: b'250 DSNrn'
reply: retcode (250); Msg: b'smtp.aliyun-inc.comn8BITMIMEnAUTH=PLAIN LOGIN XALIOAUTHnAUTH PLAIN LOGIN XALIOAUTHnPIPELININGnDSN'
send: 'AUTH PLAIN AHJvb3RAd2hvb28udG9wAFN5cTIwMDkwMDEzMDEwNw==rn'
reply: b'235 Authentication successfulrn'
reply: retcode (235); Msg: b'Authentication successful'
send: 'mail FROM:<mock@xxserver.com>rn'
reply: b'250 Mail Okrn'
reply: retcode (250); Msg: b'Mail Ok'
send: 'rcpt TO:<to@email.com>rn'
reply: b'250 Rcpt Okrn'
reply: retcode (250); Msg: b'Rcpt Ok'
send: 'datarn'
reply: b'354 End data with <CR><LF>.<CR><LF>rn'
reply: retcode (354); Msg: b'End data with <CR><LF>.<CR><LF>'
data: (354, b'End data with <CR><LF>.<CR><LF>')
send: b'Content-Type: text/plain; charset="utf-8"rnMIME-Version: 1.0rnContent-Transfer-Encoding: base64rnSubject: subject 1rnFrom: mock@xxserver.comrnTo: to@email.comrnrnaGVsbG8sIHNlbmQgYnkgUHl0aG9uLi4urn.rn'
**Success**
reply: b'250 Data Ok: queued as freedomrn'
reply: retcode (250); Msg: b'Data Ok: queued as freedom'
data: (250, b'Data Ok: queued as freedom')
send: 'quitrn'
reply: b'221 Byern'
reply: retcode (221); Msg: b'Bye'