Method:SMTP Direct via PowerMTA 5.0r3
Headers:Exchange format - No X-Mailer - No X-MS headers
HELO:mail.{domain} - Dynamic PTR match
Envelope:From domain = HELO domain - SPF aligned
DKIM:1024-bit RSA - Selector: s1 - Canonicalization: relaxed/relaxed
Content:Plain HTML - No images first send - Pattern shuffler ON
Throttle:50/hour per IP - 4 IPs rotation - 200/hour total
Warmup:Day 1-7: 10/day - Day 8-14: 50/day - Day 15+: 200/day
IP Pool:89.167.40.x /28 - Clean reputation - No blacklists
Tests:2,400 sends - 2,400 inbox - 0 spam - 0 bounce