Add mailblastr.com.mail-send-and-receive template (Amazon SES sending + receiving)

[shekhu10]

Description

Adds mailblastr.com.mail-send-and-receive.json — a Domain Connect template that configures DNS for both sending and receiving email with MailBlastr, a developer email platform built on Amazon SES. It installs:

• a DKIM key TXT on the fixed selector host mailblastr._domainkey (BYODKIM public key),
• the outbound MAIL FROM records on the custom MAIL FROM subdomain — an SPFM SPF record + a feedback MX (feedback-smtp.%region%.amazonses.com),
• an inbound MX (inbound-smtp.%region%.amazonaws.com) so the domain can receive mail.

The record set mirrors the already-merged resend.com.mail-send-and-receive.json (same Amazon SES records) and is a companion to the merged mailblastr.com.email.json (#1292). dc-template-linter reports no warnings or errors for this file.

Type of change

Please mark options that are relevant.

• New template
• Bug fix (non-breaking change which fixes an issue in the template)
• New feature (non-breaking change which adds functionality to the template)
• Breaking change (fix or feature that would cause existing template behavior to be not backward compatible)

How Has This Been Tested?

Please mark the following checks done

• 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 — https://www.mailblastr.com/logo.svg (200, image/svg+xml)

Checklist of common problems

Mark all the checkboxes after conducting the check. Comment on any point which is not fulfilled.
See Template Quality Guidelines for details and rationale on each rule.

• syncPubKeyDomain is set — this is mandatory; omitting it requires explicit justification in the PR description or the PR will be rejected
• warnPhishing is not set alongside syncPubKeyDomain — the two must not appear together
• syncRedirectDomain is set whenever the template uses redirect_uri in the synchronous flow
• no TXT record contains SPF content ("v=spf1 ...") — use the SPFM record type instead
• txtConflictMatchingMode is set on every TXT record that must be unique per label or content prefix (e.g. DMARC)
• no variable is used as a bare full record value (e.g. @ TXT "%foo%") unless necessary — prefer @ TXT "service-foo=%foo%"; if bare, justify in the PR description — N/A: the only TXT (DKIM) uses a prefixed value v=DKIM1; k=rsa; p=%domainKey%
• no bare variable is used as the full host label — the non-variable parts are fixed to limit misuse (e.g. %dkimkey%._domainkey, not %dkimhost%); if bare, justify in the PR description — see justification below (%mailfromhost%, %inboundMXDomain%)
• no variable is used in the host field to create a subdomain — use the host parameter or multiInstance instead — see justification below
• %host% does not appear explicitly in any host attribute
• essential is set to OnApply on records the end user may need to modify or remove without breaking the template (e.g. DMARC)

Notes on the checklist:

• The DKIM key TXT uses a fixed selector host (mailblastr._domainkey) and a prefixed value (v=DKIM1; k=rsa; p=%domainKey%), so neither the bare-value nor the bare-host rule applies to it.
• The bare host variables are %mailfromhost% (the per-domain SES custom MAIL FROM subdomain label, default send) and %inboundMXDomain% (the host the user wants to receive mail on). Both must be variables because they are chosen per domain by the user. This mirrors the merged resend.com.mail-send-and-receive.json (%spfDomain%, %inboundMXDomain%), and dc-template-linter reports no issue.
• This template contains no DMARC or other user-removable / uniqueness-sensitive record, so txtConflictMatchingMode and essential: OnApply are not applicable.

Online Editor test results

Editor test link(s):
Test mailblastr.com/mail-send-and-receive example.com/@

Test mailblastr.com/mail-send-and-receive example.com/mail

[github-actions]

✅ JSON Filename Check Passed

[github-actions]

✅ JSON Schema Validation Passed

[github-actions]

Linter OK

mailblastr.com.mail-send-and-receive.json

Level	Code	Note

[github-actions]

PR Description Check Passed

All required sections are filled in correctly.

Details

  OK  Type of change: 1/4 checkboxes ticked
  OK  How Has This Been Tested?: all 3 checkboxes ticked
  OK  Checklist of common problems: 7/10 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