Databricks and SMTP

[746837]

Using databricks as aws partner trying to run python script to validate email addresses.  Whenever it gets to the smtp portion it times out.  I am able to telnet from python to the POP servers and get a response, I can ping domains and get replies, but when trying to telnet to port 25 or 587 of smtp it times out after 15 minutes if there is no timeout set. The security groups all have outbound rules to allow all traffic to destination 0.0.0.0/0 so I'm trying to find out why smtp ports time out only.  Any insights if someone has come across this would be greatly appreciated.

[Atanu]

When you say timing out, what is the error you are seeing in databricks side?

[746837]

TimeoutError                              Traceback (most recent call last)
File <command-3312150305305279>, line 2
      1 email = 'geraldgleason@outlook.com'
----> 2 check_email(email)

File <command-3312150305305278>, line 19, in check_email(email)
     17 with smtplib.SMTP() as smtp:
     18   try:
---> 19       smtp.connect(mx_records[0].exchange.to_text())
     20       code, _ = smtp.helo()
     21       if code != 250:

File /usr/lib/python3.10/smtplib.py:341, in SMTP.connect(self, host, port, source_address)
    339     port = self.default_port
    340 sys.audit("smtplib.connect", self, host, port)
--> 341 self.sock = self._get_socket(host, port, self.timeout)
    342 self.file = None
    343 (code, msg) = self.getreply()