Hallo,
wir haben das Problem, dass manche fremden E-Mail-Server unsere E-Mail ablehnen, da die PTR-DNS nicht stimmt:
Fehlermeldung:
<name@xyz.com>: host mail.xyz.com[IP] said: 450 4.7.1 <proxmox.domain.local>: Helo command rejected: Host not found (in reply to RCPT TO command)
Unser PMG hat...
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