Add TrekMail email hosting configuration

[loyderhy2]

Description

Email hosting template for TrekMail — a multi-domain email hosting platform (https://trekmail.net). Configures MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, and auto-discovery records.

Type of change

• New template

How Has This Been Tested?

• Template functionality checked using Online Editor
• Template file name follows the pattern <providerId>.<serviceId>.json
• resource URL provided with 'logoUrl' is actually served by a webserver

Checklist of common problems

• syncPubKeyDomain is set (trekmail.net)
• warnPhishing is NOT set alongside syncPubKeyDomain
• syncRedirectDomain is set (trekmail.net)
• No TXT record contains SPF content (using SPFM type)
• txtConflictMatchingMode set on DMARC, TLS-RPT, MTA-STS TXT records
• No bare variable as full record value
• No bare variable as full host label
• No %host% in any host attribute
• essential set to OnApply on DMARC record

Online Editor test results

• trekmail.net.mail_hosting (root) — all 10 records generated correctly
• trekmail.net.mail_hosting (with host) — tested with host "mail"

[github-actions]

✅ JSON Filename Check Passed

[github-actions]

✅ JSON Schema Validation Passed

[github-actions]

Linter OK

trekmail.net.mail_hosting.json

Level	Code	Note
info	DCTL1021	missing from iana definitions
info	DCTL1021	missing from iana definitions

[github-actions]

PR Description Check Passed

All required sections are filled in correctly.

Details

  OK  Type of change: 1/1 checkboxes ticked
  OK  How Has This Been Tested?: all 3 checkboxes ticked
  OK  Checklist of common problems: 9/9 checkboxes ticked
  OK  Online Editor test results: 2 link(s) found
  OK  Template coverage: all 1 template(s) covered
Labels to remove: Checklist of common problems not complete, Forged editor links, PR description incomplete, Test links missing

PR description check PASSED