chore(deps): update dependency mailkit to 4.18.1

[thomhurst]

This PR contains the following updates:

Package	Change	Age	Confidence
MailKit (source)	4.18.0 → 4.18.1

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Release Notes

jstedfast/MailKit (MailKit)

v4.18.1

Compare Source

• Fixed telemetry duration histograms being 100x too large on Linux/macOS.
  (issue #​2020)
• Bumped MimeKit dependency from 4.18.0 to 4.18.1.

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Configuration

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[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-27T16:21:36.943759Z	8f152e3	New commits

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: f86aed54-afe9-4119-a7fb-24aaaef4f773

📥 Commits

Reviewing files that changed from the base of the PR and between 39e5e65 and f41e790.

📒 Files selected for processing (1)

• Directory.Packages.props

Included review availability: This review used your included allowance. Your plan provides up to 4 included reviews per hour; 1 remain after this review.

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📝 Walkthrough

Walkthrough

The centrally managed MailKit package version changed from 4.18.0 to 4.18.1.

Changes

MailKit package update

Layer / File(s)	Summary
Update MailKit version Directory.Packages.props	The centrally managed MailKit version changed from 4.18.0 to 4.18.1.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to f41e7

No concrete regression is identified in the supplied context, so this dependency update appears ready to merge.

Architecture Summary

Architecture risk: 🔵 Low · up to f41e7

The change affects 1 system.

Changed systems: Directory.Packages.props

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — Directory.Packages.props (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in Directory.Packages.props: The centrally managed MailKit package version changed from 4.18.0 to 4.18.1.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the dependency update and specifies the new MailKit version, which matches the pull request changes.

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_{A rabbit checks the package line,
A newer MailKit version shines.
From four eighteen point zero,
To point one it hops in tow.
A neat small change, recorded right,
Then bounds away into the night.}

_{Comment @coderabbitai help to get the list of available commands.}

[greptile-apps]

Confidence Score: 5/5

[High risk] Updates email library dependency to a patch version.

The PR appears safe to merge.

Summary

Updates the centrally managed MailKit version from 4.18.0 to 4.18.1.

_{Reviews (2) · Last reviewed commit: "chore(deps): update dependency mailkit t..."}