Add SMTP Mail Tests

[justindbaur]

🎟️ Tracking

📔 Objective

We are going to be adding functionality to allow the adding a certificates to the trust store without going through update-ca-certificates to support non-root scenarios. SMTP is one of the areas that needs consideration. While working on those changes @tangowithfoxtrot and I started on some tests and these are the result of that. The new functionality and at least one new test will be added in a later PR.

📸 Screenshots

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – 38b0b92f-054c-448e-86b3-4cd4e1ee525c

New Issues (1)

Checkmarx found the following issues in this Pull Request

Severity	Issue	Source File / Package	Checkmarx Insight
	SSL_Verification_Bypass	/src/Core/Services/Implementations/MailKitSmtpMailDeliveryService.cs: 76	details /src/Core/Services/Implementations/MailKitSmtpMailDeliveryService.cs relies HTTPS requests, in SendEmailAsync. The ServerCertificateValidationCallb... Attack Vector

Fixed Issues (7)

Great job! The following issues were fixed in this Pull Request

Severity	Issue	Source File / Package
	CSRF	/src/Api/AdminConsole/Controllers/GroupsController.cs: 164
	CSRF	/bitwarden_license/src/Scim/Controllers/v2/GroupsController.cs: 86
	CSRF	/src/Api/AdminConsole/Public/Controllers/GroupsController.cs: 133
	CSRF	/bitwarden_license/src/Scim/Controllers/v2/GroupsController.cs: 96
	SSL_Verification_Bypass	/src/Core/Services/Implementations/MailKitSmtpMailDeliveryService.cs: 73
	SSL_Verification_Bypass	/src/Core/Services/Implementations/MailKitSmtpMailDeliveryService.cs: 73
	SSL_Verification_Bypass	/src/Core/Services/Implementations/MailKitSmtpMailDeliveryService.cs: 73

[codecov]

Codecov Report

Attention: Patch coverage is 65.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 45.05%. Comparing base (7b2b62e) to head (b2b98d8).
Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
.../Implementations/MailKitSmtpMailDeliveryService.cs	65.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5597      +/-   ##
==========================================
+ Coverage   44.99%   45.05%   +0.06%     
==========================================
  Files        1562     1563       +1     
  Lines       71493    71605     +112     
  Branches     6403     6407       +4     
==========================================
+ Hits        32168    32262      +94     
- Misses      37959    37973      +14     
- Partials     1366     1370       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud