773c443079
David Sgro (PA OAG complaint BCP-26-05-025816) opted out 2026-04-13; response emailed to the AG 2026-06-11. To make the suppression bulletproof and keep the response's representations true: - Added a legal do-not-contact list (DO_NOT_CONTACT_DOMAINS/_EMAILS) to _email_exclusions.py with dataspindle.com / dave@dataspindle.com; folded into BLOCKED_EMAIL_DOMAINS and is_blocked(). - listmonk_import.upsert_subscriber now refuses to import/re-confirm any suppressed address. This closes the exact gap that re-added him on 2026-04-26: the duplicate-import branch re-added an existing unsubscribed subscriber to lists with status=confirmed, overriding the opt-out.
90 lines
4.2 KiB
Python
90 lines
4.2 KiB
Python
"""Shared recipient-domain exclusions for outbound cold-email campaigns.
|
|
|
|
We self-host our MTA (transactional relays like SES forbid cold email), so we
|
|
must protect our sending-IP reputation manually. The two biggest levers:
|
|
|
|
1. NOT mailing the Yahoo/Verizon-Media family: those providers aggressively
|
|
defer cold senders with "unexpected volume / user complaints" 421
|
|
responses, which poisons the IP for every other provider too.
|
|
2. NOT mailing Google CONSUMER mailboxes (gmail.com etc.) from a cold/warming
|
|
IP: Google hard-rejects them with 550-5.7.1 "this message is likely
|
|
unsolicited mail", and those rejections are reputation-damaging. (On
|
|
2026-06-08 a warmup audit found gmail.com alone was 77% of our 550-5.7.1
|
|
blocks -- 427 of 556.) Custom domains hosted on Google Workspace are a
|
|
smaller, MX-only signal handled separately in the per-vertical builders.
|
|
|
|
Keep this list authoritative and import it everywhere we build audiences.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
# Yahoo / Verizon Media operates ALL of these consumer domains. Legacy AT&T and
|
|
# Frontier consumer mail was handed off to Yahoo's infrastructure as well.
|
|
YAHOO_FAMILY_DOMAINS: frozenset[str] = frozenset({
|
|
# Yahoo / AOL core
|
|
"yahoo.com", "yahoo.com.mx", "yahoo.es", "yahoo.it", "yahoo.ca",
|
|
"myyahoo.com", "ymail.com", "rocketmail.com",
|
|
"aol.com", "aol.com.mx", "aim.com", "love.com", "games.com", "wow.com",
|
|
"netscape.net", "netscape.com", "cs.com", "compuserve.com",
|
|
# AT&T family (Yahoo-hosted)
|
|
"att.net", "sbcglobal.net", "bellsouth.net", "pacbell.net",
|
|
"ameritech.net", "swbell.net", "snet.net", "flash.net", "prodigy.net",
|
|
"wans.net", "nvbell.net",
|
|
# Verizon family (Yahoo-hosted)
|
|
"verizon.net", "verizongni.com", "bellatlantic.net",
|
|
# Frontier (Yahoo-hosted)
|
|
"frontier.com", "frontiernet.net",
|
|
})
|
|
|
|
# Google consumer mailboxes. Google's cold-IP spam filter (550-5.7.1) is the
|
|
# strictest of the big providers; consumer gmail accounts have the highest
|
|
# complaint sensitivity. We hold these out of cold/warmup sends. (This is the
|
|
# domain-string layer; custom domains silently on Google Workspace need an MX
|
|
# lookup and are handled in the per-vertical builders, e.g. the healthcare
|
|
# mx_provider flag.)
|
|
GOOGLE_CONSUMER_DOMAINS: frozenset[str] = frozenset({
|
|
"gmail.com", "googlemail.com",
|
|
})
|
|
|
|
# Microsoft consumer mailboxes (Outlook.com / Hotmail). Microsoft's cold-IP
|
|
# filtering (SmartScreen) tends to silently route cold B2B mail to Junk or
|
|
# soft-defer rather than hard-bounce, so it is less visible than Google's
|
|
# 550-5.7.1 but still a reputation drag (low engagement, spam-folder placement)
|
|
# on a warming IP. These are consumer mailboxes, not real B2B carrier contacts,
|
|
# so we hold them out of cold/warmup sends like the other consumer providers.
|
|
MICROSOFT_CONSUMER_DOMAINS: frozenset[str] = frozenset({
|
|
"hotmail.com", "outlook.com", "live.com", "msn.com", "hotmail.co.uk",
|
|
"hotmail.fr", "live.co.uk", "outlook.es", "passport.com", "windowslive.com",
|
|
})
|
|
|
|
# Legal / complaint do-not-contact list. Addresses and domains here must NEVER
|
|
# be cold-mailed or re-imported, independent of consumer-domain reputation
|
|
# rules. Add a domain or a specific address when someone makes a formal
|
|
# do-not-contact / opt-out demand we are honoring (e.g. a regulator complaint).
|
|
# dataspindle.com / dave@dataspindle.com -- David Sgro, PA OAG complaint
|
|
# BCP-26-05-025816; opted out 2026-04-13, permanently suppressed.
|
|
DO_NOT_CONTACT_DOMAINS: frozenset[str] = frozenset({
|
|
"dataspindle.com",
|
|
})
|
|
DO_NOT_CONTACT_EMAILS: frozenset[str] = frozenset({
|
|
"dave@dataspindle.com",
|
|
})
|
|
|
|
# The full set of consumer domains we refuse to cold-mail. Extend here as we
|
|
# discover other reputation-sensitive providers.
|
|
BLOCKED_EMAIL_DOMAINS: frozenset[str] = (
|
|
YAHOO_FAMILY_DOMAINS | GOOGLE_CONSUMER_DOMAINS | MICROSOFT_CONSUMER_DOMAINS
|
|
| DO_NOT_CONTACT_DOMAINS
|
|
)
|
|
|
|
|
|
def domain_of(email: str) -> str:
|
|
"""Return the lowercased domain part of an email, or '' if malformed."""
|
|
if "@" not in email:
|
|
return ""
|
|
return email.rsplit("@", 1)[-1].strip().lower()
|
|
|
|
|
|
def is_blocked(email: str) -> bool:
|
|
e = (email or "").strip().lower()
|
|
return e in DO_NOT_CONTACT_EMAILS or domain_of(e) in BLOCKED_EMAIL_DOMAINS
|