Hello
As I solve this problems in my proxmox pmg, I have clients sending out external port 26 emails
(Host or domain name not found. Name service error for name=xxxxxxxxxx.com.br type=AAAA: Host not found)
Feb 12 09:30:52 security postfix/smtp[22059]: EDA026E6C7: to=<eduardo@aaaaaaaa.com.br>, relay=none, delay=0.53, delays=0.07/0/0.47/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=xxxxxxxxxx.com.br type=AAAA: Host not found)
Feb 12 09:30:53 security postfix/smtp[21586]: EDA026E6C7: to=<rh@xxxxxxxxxxxxx.org.br>, relay=ASPMX.L.GOOGLE.COM[74.125.127.27]:25, delay=1.8, delays=0.07/0/0.82/0.88, dsn=2.0.0, status=sent (250 2.0.0 OK 1549971053 d17si2386850otq.103 - gsmtp)
Feb 12 09:30:53 security postfix/qmgr[21408]: EDA026E6C7: removed
As I solve this problems in my proxmox pmg, I have clients sending out external port 26 emails
(Host or domain name not found. Name service error for name=xxxxxxxxxx.com.br type=AAAA: Host not found)
Feb 12 09:30:52 security postfix/smtp[22059]: EDA026E6C7: to=<eduardo@aaaaaaaa.com.br>, relay=none, delay=0.53, delays=0.07/0/0.47/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=xxxxxxxxxx.com.br type=AAAA: Host not found)
Feb 12 09:30:53 security postfix/smtp[21586]: EDA026E6C7: to=<rh@xxxxxxxxxxxxx.org.br>, relay=ASPMX.L.GOOGLE.COM[74.125.127.27]:25, delay=1.8, delays=0.07/0/0.82/0.88, dsn=2.0.0, status=sent (250 2.0.0 OK 1549971053 d17si2386850otq.103 - gsmtp)
Feb 12 09:30:53 security postfix/qmgr[21408]: EDA026E6C7: removed