Fix: Add required EmailAccountType key to com.apple.mail.managed rules

[nancysangani]

Resolves #481
All 11 rules using the com.apple.mail.managed payload domain were missing the EmailAccountType key, which Apple's device management spec marks as required. Without it, these profiles silently fail to deploy when pushed from an MDM server.

Added EmailAccountType: EmailTypeIMAP to all affected rules. IMAP is used as the account type since POP3 does not support S/MIME signing, encryption, or folder-level operations enforced by several of these rules.

Note: cspell CI failures will be resolved once PR #656 is merged into main, as it adds the required project-specific identifiers to project-words.txt.

[Copilot]

Pull request overview

This PR updates the iOS rule YAMLs that generate com.apple.mail.managed configuration profiles to include Apple’s required EmailAccountType key, preventing silent deployment failures when profiles are pushed via MDM (per issue #481).

Changes:

• Added EmailAccountType: EmailTypeIMAP under mobileconfig_info.com.apple.mail.managed for all affected rules.
• Normalized minor YAML formatting in the touched com.apple.mail.managed blocks (e.g., removing trailing whitespace).
• Converted one fix: field to the block (|) style consistent with other rules in this area.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
rules/os/os_mail_move_messages_disable.yaml	Adds required EmailAccountType to the com.apple.mail.managed payload.
rules/os/os_mail_maildrop_disable.yaml	Adds required EmailAccountType to the com.apple.mail.managed payload.
rules/os/os_exchange_SMIME_signing_overwrite_disable.yaml	Adds required EmailAccountType and normalizes the com.apple.mail.managed block formatting.
rules/os/os_exchange_SMIME_signing_enabled.yaml	Adds required EmailAccountType and normalizes the com.apple.mail.managed block formatting.
rules/os/os_exchange_SMIME_signing_certificate_overwrite_disable.yaml	Adds required EmailAccountType and normalizes the com.apple.mail.managed block formatting.
rules/os/os_exchange_SMIME_encryption_per_message_disable.yaml	Adds required EmailAccountType; also adjusts fix: to a block style.
rules/os/os_exchange_SMIME_encryption_default_certificate_overwrite_enable.yaml	Adds required EmailAccountType to the com.apple.mail.managed payload.
rules/os/os_exchange_SMIME_encryption_certificate_overwrite_disable.yaml	Adds required EmailAccountType and normalizes the com.apple.mail.managed block formatting.
rules/os/os_exchange_prevent_move_enforce.yaml	Adds required EmailAccountType and normalizes the com.apple.mail.managed block formatting.
rules/os/os_exchange_peraccountVPN.yaml	Adds required EmailAccountType and normalizes the com.apple.mail.managed block formatting.
rules/os/os_exchange_mail_recents_sync_disable.yaml	Adds required EmailAccountType to the com.apple.mail.managed payload.

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[robertgendler]

Tagging @headmin for review as most of these fall into the BSI Indigo benchmark.