Dear,
Since today we have a lot of delivery issues towards office 365 customers.
Some logging:
Jul 6 11:01:01 mycoolserver01 postfix/smtp[9062]: 7CA402042A8: to=<monitoring@filtered-gdpr01.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered.mail.protection.outlook.com: Name or service not known)
Jul 6 11:01:31 mycoolserver01 postfix/smtp[9060]: DBE6220260D: to=<cca@filtered-gdpr02.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-org.mail.protection.outlook.com: Name or service not known)
Jul 6 11:02:28 mycoolserver01 postfix/smtp[9062]: D2C5820260D: to=<join@filtered-gdpr03.com>, relay=none, delay=15, delays=0.04/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-org.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:28 mycoolserver01 postfix/smtp[9059]: 24E722042A4: to=<filtered@filtered-gdpr04.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host be-filtered-com.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:38 mycoolserver01 postfix/smtp[9062]: 0014F2030D6: to=<jan@filtered-gdpr05.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:38 mycoolserver01 postfix/smtp[9062]: 0014F2030D6: to=<koen@filtered-gdpr05.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:38 mycoolserver01 postfix/smtp[9062]: 0014F2030D6: to=<maarten@filtered-gdpr05.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:58 mycoolserver01 postfix/smtp[9060]: 648E92030D6: to=<tania@filtered-gdpr06.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:01 mycoolserver01 postfix/smtp[9062]: 3FA8A20267F: to=<filtered@filtered-gdpr05.com>, relay=none, delay=10, delays=0.03/0/10/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:01 mycoolserver01 postfix/smtp[8781]: 7E574202584: to=<filtered@filtered-gdpr05.com>, relay=none, delay=15, delays=0.09/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:44 mycoolserver01 postfix/smtp[15612]: 956B220265D: to=<filtered@filtered-gdpr07.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:45 mycoolserver01 postfix/smtp[15653]: 9DD162042A8: to=<jan.filtered@filtered-gdpr8.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:47 mycoolserver01 postfix/smtp[11484]: C05A4203218: to=<filtered@filtered-gdpr01.com>, relay=none, delay=15, delays=0.07/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:15:12 mycoolserver01 postfix/smtp[15653]: 6F7012042AF: to=<caroline.filtered@filtered-gdpr9.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host wgcbrugfilteredsepoort-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:17:32 mycoolserver01 postfix/smtp[15652]: D84142042A4: to=<filtered@filtered-gdpr07.com>, relay=none, delay=10, delays=0.06/0/10/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
It's having issues with dns-resolving the transport address. Because of that it's bounces the mail.
First we thought it was a proxmox-server issue or a local DNS server issue, but it wasn't.
Apparently microsoft is having issues on their nameservers. They responds with a SERVFAIL. This, at least on that timestamp, could be reproduced with querying them directly.
My question is:
IS there a possibility to queue mails when transport address can't be resolved, instead of immediately bouncing them?
Best regards,
Frederic
Since today we have a lot of delivery issues towards office 365 customers.
Some logging:
Jul 6 11:01:01 mycoolserver01 postfix/smtp[9062]: 7CA402042A8: to=<monitoring@filtered-gdpr01.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered.mail.protection.outlook.com: Name or service not known)
Jul 6 11:01:31 mycoolserver01 postfix/smtp[9060]: DBE6220260D: to=<cca@filtered-gdpr02.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-org.mail.protection.outlook.com: Name or service not known)
Jul 6 11:02:28 mycoolserver01 postfix/smtp[9062]: D2C5820260D: to=<join@filtered-gdpr03.com>, relay=none, delay=15, delays=0.04/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-org.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:28 mycoolserver01 postfix/smtp[9059]: 24E722042A4: to=<filtered@filtered-gdpr04.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host be-filtered-com.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:38 mycoolserver01 postfix/smtp[9062]: 0014F2030D6: to=<jan@filtered-gdpr05.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:38 mycoolserver01 postfix/smtp[9062]: 0014F2030D6: to=<koen@filtered-gdpr05.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:38 mycoolserver01 postfix/smtp[9062]: 0014F2030D6: to=<maarten@filtered-gdpr05.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:09:58 mycoolserver01 postfix/smtp[9060]: 648E92030D6: to=<tania@filtered-gdpr06.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:01 mycoolserver01 postfix/smtp[9062]: 3FA8A20267F: to=<filtered@filtered-gdpr05.com>, relay=none, delay=10, delays=0.03/0/10/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:01 mycoolserver01 postfix/smtp[8781]: 7E574202584: to=<filtered@filtered-gdpr05.com>, relay=none, delay=15, delays=0.09/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:44 mycoolserver01 postfix/smtp[15612]: 956B220265D: to=<filtered@filtered-gdpr07.com>, relay=none, delay=15, delays=0.03/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:45 mycoolserver01 postfix/smtp[15653]: 9DD162042A8: to=<jan.filtered@filtered-gdpr8.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:10:47 mycoolserver01 postfix/smtp[11484]: C05A4203218: to=<filtered@filtered-gdpr01.com>, relay=none, delay=15, delays=0.07/0/15/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:15:12 mycoolserver01 postfix/smtp[15653]: 6F7012042AF: to=<caroline.filtered@filtered-gdpr9.com>, relay=none, delay=15, delays=0.02/0/15/0, dsn=5.4.4, status=bounced (unable to look up host wgcbrugfilteredsepoort-be.mail.protection.outlook.com: Name or service not known)
Jul 6 11:17:32 mycoolserver01 postfix/smtp[15652]: D84142042A4: to=<filtered@filtered-gdpr07.com>, relay=none, delay=10, delays=0.06/0/10/0, dsn=5.4.4, status=bounced (unable to look up host filtered-be.mail.protection.outlook.com: Name or service not known)
It's having issues with dns-resolving the transport address. Because of that it's bounces the mail.
First we thought it was a proxmox-server issue or a local DNS server issue, but it wasn't.
Apparently microsoft is having issues on their nameservers. They responds with a SERVFAIL. This, at least on that timestamp, could be reproduced with querying them directly.
My question is:
IS there a possibility to queue mails when transport address can't be resolved, instead of immediately bouncing them?
Best regards,
Frederic
Last edited:
