I have setup a post.io mail server on a server and configured it towards a domain I own.
By running the first example in their documentation
docker run \
-p 25:25 \
-p 80:80 \
-p 443:443 \
-p 110:110 \
-p 143:143 \
-p 465:465 \
-p 587:587 \
-p 993:993 \
-p 995:995 \
-e TZ=Europe/Prague \
-v /your-data-dir/data:/data \
-t analogic/poste.io
Then I was able to reach to a dashboard in localhost and send emails through GUI.
But I did not know exactly which one is the SMTP domain. This is the python snippet I used:
smtpObj = smtplib.SMTP(NO_IDEA_WHAT_TO_PUT_HERE, 587)
smtpObj.ehlo()
smtpObj.starttls()
smtpObj.login(SENDER, EMAIL_PASSWORD)
msg = MIMEMultipart()
msg["Subject"] = SUBJECT
msg["From"] = SENDER # me!
msg["To"] = RECIPIENT
msg['Date'] = formatdate(localtime=True)
email_body = MIMEText(SOMETHING, 'html') # text
msg.attach(email_body)
smtpObj.send_message(msg)
smtpObj.quit()
The variable NO_IDEA_WHAT_TO_PUT_HERE was set on mail.poste.io but I get a
raise SMTPAuthenticationError(code, resp) smtplib.SMTPAuthenticationError: (535, b'5.7.8 Authentication failed')
Then I consequently tried MY_DOMAIN and mail.MY_DOMAIN. Also here, without any success.
Then I noticed another part of the documentation and tried another command:
docker run \
--net=host \
-e TZ=Europe/Prague \
-v /your-data-dir/data:/data \
--name "mailserver" \
-h "mail.MY_DOMAIN" \
-t analogic/poste.io
Though now I cannot connect on local either as it mentions: sudo: unable to resolve host mail.MY_DOMAIN: Name or service not known
As poste.io claims that you can run your own SMPT server, shouldn't the SMPT server be something like mail.MY_DOMAIN? And in that case, how exactly can I connect?
In "usual" email providers this is also solved through a app-developer third-party, and a new token is generated. At least, this was my experience with most cloud providers: Gmail, OutLook, Yahoo, GMX and FastMail.
Any insight in how to run it correctly? What am I missing here?
