feat: allow pass hostname in docker env

[tomerqodo]

Benchmark PR from agentic-review-benchmarks#6

[augmentcode]

🤖 Augment PR Summary

Summary: Adds an optional SMTP client hostname override to support environments where the default HELO/EHLO identity is rejected.

Changes:

• Introduces SMTP_LOCAL_HOSTNAME in mail configuration settings and .env examples
• Plumbs the setting into the SMTP client via local_hostname and updated EHLO/STARTTLS behavior
• Exposes the variable through Docker compose shared environment and updates unit/integration tests

Technical Notes: The SMTP connection now passes local_hostname into smtplib.SMTP/SMTP_SSL, and STARTTLS flow performs EHLO before and after starttls().

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[augmentcode]

Review completed. 2 suggestions posted.

Comment augment review to trigger a new review at any time.

[augmentcode]

When SMTP_LOCAL_HOSTNAME is unset, local_host becomes "", so smtp.ehlo(local_host) sends an empty HELO/EHLO name; some servers reject that. Consider letting smtplib pick its default EHLO name when no override is configured rather than explicitly passing an empty string.

Other Locations

• api/libs/smtp.py:36

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[augmentcode]

These assertions now use local_hostname=ANY, which means the tests won’t catch regressions where the configured SMTP_LOCAL_HOSTNAME value isn’t actually propagated. Consider adding at least one test case with a non-empty SMTP_LOCAL_HOSTNAME and asserting it’s passed through to the SMTP constructor/ehlo.

Other Locations

• api/tests/unit_tests/tasks/test_mail_send_task.py:154
• api/tests/unit_tests/tasks/test_mail_send_task.py:184
• api/tests/unit_tests/tasks/test_mail_send_task.py:216

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