All transactional/worker senders built multipart/alternative (or mixed)
messages with ONLY an HTML part. A single-part multipart/alternative is
malformed and HTML-only mail is a spam-score signal -- the same class of
deliverability bug that hurt the campaign pipeline, but on the telecom /
filing / customer-transactional path (499-Q reminders, RMD/FCC filing
review links, intake/completion/delivery emails, commissions, etc).
- worker_email.send_worker_email: auto-derive plaintext from HTML when
caller omits text= (fixes the shared helper for all current+future use)
- 16 rolled-their-own senders in scripts/workers/** + scripts/formation/
document_delivery.py: attach html_to_text(...) plaintext sibling before
the HTML part (job_server + document_delivery wrap text+html in an
alternative sub-part so PDFs still attach to the mixed root)
- api/src/email.ts: add dependency-free htmlToText() and default
sendEmail text to it (fixes checkout/webhook HTML-only sends)
Verified: all py files compile + import at runtime, api tsc passes,
htmlToText handles hrefs/lists/entities, 11 plaintext unit tests pass.
Telecom campaign 407 (Jun 8) was HTML-only + sent in the DKIM-broken
window -> 384 sent / 0 clicks (same junked-mail signature).
When AUTO_FILING_ENABLED is explicitly set as an env var, skip the
ERPNext API call entirely. The ERPNext client hangs indefinitely
when the host is unreachable (dev workers can't reach prod ERPNext),
blocking all compliance handlers.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
