Hello,
I've posted this some times ago, but I ran into the same problem again:
- 3CX AI Version, self hosted, valid IPv4 and IPv6, DNS A and AAAA records correct
- own SMTP Server, hosted in data center, IPv4 and IPv6, DNS A and AAAA records correct, PTR correct too
Everythind works correct, alerts are coming in etc.
Unfortunally, only the Voicemail Mails with the attached WAV file doesnt work, in the eventlog:
Fehler
50026
28.10.2026 14:48
System Manager
Logit
The following error occurred when trying to send an email with subject Neue Sprachnachricht von 071xxxxxxx – 071xxxxxxx to [email protected] :. Eine vorhandene Verbindung wurde vom Remotehost geschlossen.
My workaround was to modifiy the "C:\Windows\System32\drivers\etc\hosts" file and put the DNS name of my Mailserver as IPv4, then, the Voicemails goes out.
Could anyone reproduce this issue or 3CX, could you investigate why just the Voicemail transmission fails?
FYI: there is no contact from 3CX to my Mail Server via IPv6 when the Voicemails should go out.
Thank you.
I've posted this some times ago, but I ran into the same problem again:
- 3CX AI Version, self hosted, valid IPv4 and IPv6, DNS A and AAAA records correct
- own SMTP Server, hosted in data center, IPv4 and IPv6, DNS A and AAAA records correct, PTR correct too
Everythind works correct, alerts are coming in etc.
Unfortunally, only the Voicemail Mails with the attached WAV file doesnt work, in the eventlog:
Fehler
50026
28.10.2026 14:48
System Manager
Logit
The following error occurred when trying to send an email with subject Neue Sprachnachricht von 071xxxxxxx – 071xxxxxxx to [email protected] :. Eine vorhandene Verbindung wurde vom Remotehost geschlossen.
My workaround was to modifiy the "C:\Windows\System32\drivers\etc\hosts" file and put the DNS name of my Mailserver as IPv4, then, the Voicemails goes out.
Could anyone reproduce this issue or 3CX, could you investigate why just the Voicemail transmission fails?
FYI: there is no contact from 3CX to my Mail Server via IPv6 when the Voicemails should go out.
Thank you.
