On Mon, May 15, 2023 at 2:57 PM Tim Moody <t...@timmoody.com> wrote:
>
> I'd like to send an email from a python3 process on a wmcs VPS to report
> errors.
>
> I looked at https://wikitech.wikimedia.org/wiki/Help:Email_in_Cloud_VPS but
> could use some help.
>
> sudo echo "Subject: sendmail test2" | /usr/sbin/sendmail -v <myemail> works.
The `sudo` here does nothing useful. It is bound to the `echo`
invocation and not the `sendmail` one.
> When I try to send the equivalent from python smtplib I get a 221 error
> message.
221 is the SMTP status code for closing connection/goodbye. This isn't
specifically an error, instead it means that the SMTP server has
decided to end the session.
* Are there other status codes you see from your attempted python code
prior to the 221?
* What SMTP server are you connecting to?
* Is the python code available somewhere for review?
Here is a quick example of sending email using Python 3.9 and smtplib
from inside Toolforge:
$ become bd808-test -- webservice python3.9 shell -- python3.9
>>> import smtplib
>>> import ssl
>>> context = ssl.create_default_context()
>>> server = smtplib.SMTP("mail.tools.wmcloud.org", 587)
>>> server.starttls(context=context)
(220, b'TLS go ahead')
>>> server.sendmail("bd808-test.maintain...@toolforge.org",
"bd...@wikimedia.org", """Subject: smtplib example from Toolforge
...
... Hello world.
... ---
... Bryan""")
{}
>>> server.quit()
(221, b'mail.tools.wmcloud.org closing connection')
Things would typically look similar from a Cloud VPS project. The
major change would be to use mx-out03.wmcloud.org or
mx-out04.wmcloud.org as your outbound SMTP service. There is a bit
more complication in using TLS as well due to the x509 certificate
being a bit of a mess (bad subject and expired):
$ ssh devportal-demo01.devportal.eqiad1.wikimedia.cloud
$ python3.9
>>> import smtplib
>>> import ssl
>>> context = ssl.create_default_context()
>>> context.check_hostname = False
>>> context.verify_mode = ssl.CERT_NONE
>>> server = smtplib.SMTP("mx-out03.wmcloud.org", 25)
>>> server.starttls(context=context)
(220, b'TLS go ahead')
>>> server.sendmail("bd...@wikimedia.org", "bd...@wikimedia.org",
"""Subject: smtplib example from Cloud VPS
...
... Hello world.
... ---
... Bryan""")
{}
>>> server.close()
I hope that helps a bit.
Bryan
--
Bryan Davis Technical Engagement Wikimedia Foundation
Principal Software Engineer Boise, ID USA
[[m:User:BDavis_(WMF)]] irc: bd808
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