Added a fresh sending IP (.90/mta01) bound to the filings cold-outreach stream,
isolated from the reputation-damaged .94 trucking IP:
- .90 bound on ens18, persisted 3 ways (interfaces up/down hooks + pw-mail-ips
service + watchdog cron, all updated for the Jun-24-outage safety pattern)
- postfix 'outfilings' transport binds .90 / HELO mta01
- sender_dependent_default_transport_maps routes @filings.* -> outfilings; moved
the randmap:{out05:} catch-all to default_transport=out05 so the sender map
can win (recipient transport_maps outranks it otherwise)
- filings SPF updated to include .90
TEST RESULT: fresh IP fixed the reputation signal (Gmail error changed from
'low domain reputation' on .94 to 'likely unsolicited' cold-start on .90).
Non-Google (GMX/Microsoft) deliver fine; Gmail cold-start remains a slow wall.
Plan: CT campaign to non-Google first, warm .90, trickle Gmail over weeks.
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