A reply was not delivered
Open the ticket and read the delivery message beside the reply. It shows whether the problem is the sending domain, the customer’s address or the receiving email service.
The sending domain is not ready
Open Settings > Integrations, select the inbox and check the DNS records. Select Check again after correcting them.
The customer address does not exist or is closed
Check the address for spelling mistakes. If you have the correct address, select Correct the address and send the reply again.
If the mailbox is closed, contact the customer another way and ask for a working address.
The mailbox is full or the server did not answer
Try again later. The customer may need to make room in the mailbox or ask their email provider for help.
The receiving server refused the message
Check that your sending domain is verified. If it is verified and the address is correct, try again later. The receiving service may be blocking or delaying the message.
Contact TicketOS
If the reason is unclear, open the contact form and include the ticket number and the delivery error shown in TicketOS.
Do not send passwords, API keys or DNS login details.
Still need help?
Tell us what you tried and where you got stuck.