fix(deps): update dependency smtp-server to v3.17.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
smtp-server	3.16.1 -> 3.17.0

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Release Notes

nodemailer/smtp-server (smtp-server)

v3.17.0

Compare Source

Features

• add ability to customize auth required error message (e0f3e64)
• add configurable heloResponse option for HELO/EHLO greeting (7c8279f)
• added DSN capability to feature list (disabled by default) (#​230) (bb17377)
• added support for ENHANCEDSTATUSCODES and DSN (closes #​224) (#​225) (ad545ef)
• added support for REQUIRETLS and other body params (71ce3aa)

Bug Fixes

• 193 (657ac6e)
• added resolver option, if server closing do not permit commands (fixes #​177, fixes #​181) (#​222) (e79cac9)
• bug with proxy (#​218) (9515e38)
• bumped deps (c499a3c)
• Bumped deps (ce34da4)
• deploy: added autorelease (0dbc8e1)
• deps: Bumped deps (e096b12)
• deps: Bumped deps (0a2d601)
• deps: use punycode module (438c617)
• relax email validation to accept Gmail forwarding addresses (9e83b07)
• relax email validation to accept Gmail forwarding addresses (b5ea6d9)
• release: fixed Git URL on package.json (5876626)
• Replaced punycode with punycode.js (4ccbcf2)
• strengthen email validation in _parseAddressCommand (9aced8d)
• unref timers to allow graceful process exit (e2542d2)
• update dependencies (7f22889)
• XFORWARD: Fixed client hostname processing. Fixes #​147 (d518417)

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