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|osTicket Version||v1.10.1 (9ae093d) — Up to date|
|Web Server Software||Apache|
Unable to email via SMTP:<server>:25 [<our email address>] Failed to add recipient: <receiver's email address> [SMTP: Invalid response code received from server (code: 450, response: 4.7.1 Error: too many recipients from <IP address used also in the API of OSticket>)]"
The words between <> are used just to hide real email addresses and IPs.
It happens almost daily, even though not every time that I send an email. Do you have any suggestion about how to troubleshoot it and what may be the cause?
Thank you in advance! (and let me know if you need more info)