Share invites, share notifications and app feedback checked addresses through
EmailClient.clean/validate, a second copy of the rules in util/email.ts that
stripped dots on iCloud, stripped `+tags` on every domain, and matched the
blocklist case-sensitively. They now use util/email.ts: isBlockedEmail for the
blocklist, abuseKey for the per-address notification budget, and cleanEmail
for the invite digest key. EmailClient keeps transport and templates only.
isBlockedEmail also lowercases the configured suffixes, so a mixed-case
blocklist entry still matches.
Daniel Salazar
906d6b7886