Hi everyone,
I have been using mailcow successfully for some time.
Yesterday I noticed that I can’t receive Mail anymore, this may have been going on for a few days.
I’ve debugged this as far as I’m able to and think it might have to do with postscreen.
I can successfully send E-Mails to other providers, but mails don’t get delivered to my server anymore.
The initial connection seems to work, but then the server doesn’t respond anymore:
# swaks --to *****
=== Trying ****:25...
=== Connected to ****.
<** Timeout (30 secs) waiting for server response
-> QUIT
<** Timeout (30 secs) waiting for server response
=== Connection closed with remote host.
The log in the Postfix-Container looks like this:
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: CONNECT from [*******]:50120 to [fd4d:6169:6c63:6f77::e]:25
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc whitelist_forwardinghosts: Look up ****** on whitelist, result 200 DUNNO
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:35 3411a8a690bc postfix/postscreen[451]: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:10:38 3411a8a690bc postfix/postscreen[451]: PASS NEW [******]:50120
mailcowdockerized-postfix-mailcow-1 | Apr 30 14:12:18 3411a8a690bc postfix/postscreen[451]: warning: timeout sending connection to service private/smtpd
It looks like the handover from postscreen to the smtpd doesn’t work correctly.
Does anyone know how to debug this further, or maybe how to solve this problem?
Any help would be appreciated.
Kind regards,
Sven