Network & Email · page 23

Explains why open rates mislead and what to measure instead.

Explains Promotions tab sorting factors and implications.

Interprets reputation score bands and likely inbox effects.

Checks UTF-8 migration steps for headers, bodies, and stores.

Generates myhostname, mynetworks, and relayhost blocks from inputs.

Builds transport table rows per destination and relay.

Explains smtpd restriction list evaluation order and UCE stages.

Generates header_checks patterns for header rewriting and blocks.

Decodes queue IDs, statuses, and delay fields from mail.log lines.

Steps through mailq reading and per-domain cleanup actions.

References flush, hold, requeue, and delete commands by pattern.

Checks Dovecot SASL integration for authenticated submission.

References Exim ACL verbs, conditions, and control modifiers.

References router ordering, drivers, and conditions.

References common m4 macro lines for mailertable and relaying.

Plans maildir layout, namespaces, and naming schemes.

Plans quota rules, warning thresholds, and grace behavior.

Schedules migration cohorts with per-wave quotas and rollbacks.

Plans dual-delivery feeds to both systems during migrations.

Steps an MX switch with TTL prep and rollback rows.

Renders site-to-site mail routing flow from a hop list.

Plans which domains relay through which smarthosts.

Builds valid recipient lists for gateways to reject early.

Generates /etc/aliases lines with newaliases reminders.