87 lines
2.5 KiB
Python
87 lines
2.5 KiB
Python
# PyQuarantine-Milter is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# PyQuarantine-Milter is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with PyQuarantineMilter. If not, see <http://www.gnu.org/licenses/>.
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#
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import logging
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import smtplib
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from multiprocessing import Process, Queue
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logger = logging.getLogger(__name__)
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queue = Queue(maxsize=50)
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process = None
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def smtp_send(smtp_host, smtp_port, mailfrom, recipient, mail):
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s = smtplib.SMTP(host=smtp_host, port=smtp_port)
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s.ehlo()
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if s.has_extn("STARTTLS"):
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s.starttls()
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s.ehlo()
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s.sendmail(mailfrom, [recipient], mail)
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s.quit()
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def mailprocess():
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"Mailer process to send emails asynchronously."
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global logger
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global queue
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try:
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while True:
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m = queue.get()
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if not m:
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break
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smtp_host, smtp_port, qid, mailfrom, recipient, mail, emailtype = m
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try:
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smtp_send(smtp_host, smtp_port, mailfrom, recipient, mail)
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except Exception as e:
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logger.error(
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f"{qid}: error while sending {emailtype} "
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f"to '{recipient}': {e}")
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else:
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logger.info(
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f"{qid}: successfully sent {emailtype} to: {recipient}")
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except KeyboardInterrupt:
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pass
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logger.debug("mailer process terminated")
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def sendmail(smtp_host, smtp_port, qid, mailfrom, recipients, mail,
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emailtype="email"):
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"Send an email."
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global logger
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global process
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global queue
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if isinstance(recipients, str):
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recipients = [recipients]
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# start mailprocess if it is not started yet
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if process is None:
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process = Process(target=mailprocess)
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process.daemon = True
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logger.debug("starting mailer process")
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process.start()
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for recipient in recipients:
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try:
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queue.put(
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(smtp_host, smtp_port, qid, mailfrom, recipient, mail,
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emailtype),
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timeout=30)
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except Queue.Full:
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raise RuntimeError("email queue is full")
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