![]() ![]() SMTP Reverse DNS Mismatch -> OK - 2.2.2.2 resolves to domainC.tld SMTP Valid Hostname -> OK - Reverse DNS is a valid Hostname ![]() SMTP Connection Time -> 1.133 seconds - Good on Connection time SMTP Open Relay -> OK - Not an open relay. SMTP Transaction Time -> 3.955 seconds - Good on Transaction Time The reverse DNS entry is OK -> Only the SMTP banner is wrong But if we test the mail server of domainC.tld with (SMTP Banner Check) the domains resolves to domainA.tld (Reverse DNS does not match SMTP Banner) We want to separate customers and our own domains. Tools & Settings > Mail Server Settings > Outgoing mail mode -> Send from domain IP addresses and use domain names in SMTP greeting We have 3 domains: domainA.tld + domainB.tld + domainC.tld and each domain has a own IP address (Subscription Setting)ĭomainB = 1.1.1.1 -> Customer Subscription OS: Debian 8.7 / Plesk Onyx (Version 17.0.17 Update #13) ![]()
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