sendmail.py

import smtplib
import sys
from email.mime.text import MIMEText
from email.header import Header

# Absender-Adresse
frm = 'from@domain'
# Empfänger-Adresse
to = 'empfaenger@domain'

# SMTP-Zugangsdaten
smtpHost = 'smtpauth.bluewin.ch'
smtpPort = 587
smtpUser = 'username (=sender email)'
smtpPassword = 'passwort'

subj = 'from raspberry'
msg = 'Test'
mime = MIMEText(msg, 'plain', 'utf-8')
mime['From'] = frm
mime['To'] = to
mime['Subject'] = Header(subj, 'utf-8')

try:
    smtp = smtplib.SMTP(smtpHost, smtpPort)
    #smtp.starttls()
    smtp.login(smtpUser, smtpPassword)
    smtp.sendmail(frm, to, mime.as_string())
    smtp.quit()
except:
    print('Fehler', sys.exc_info())