5.7.0 License Key cannot use 3CX SMTP

[T2G]

Hello 3CX Team,

One of our system is unable to use 3CX SMTP. Please check the screenshot below.
How can we resolve this? For any additional information - this license is a 3CX Pro 8 SC Trial Version until April 8, 2026

 

[bitn2]

Check the time of your pbx, this could be an problem.

 

[NikosK_3CX]

I would recommend raising the issue using the contact form here:
https://www.3cx.com/contact/

 

[T2G]

Check the time of your pbx, this could be an problem.

hello @bitn2

Thanks for your reply. upon checking from the 3cx management dashboard, we are using the correct timezone (+8)

 

[T2G]

I would recommend raising the issue using the contact form here:
https://www.3cx.com/contact/

Thank you @NikosK_3CX

One of our team members has raised this issue on the contact form. Here is the case# provided - 2276145

 

[bitn2]

hello @bitn2

Thanks for your reply. upon checking from the 3cx management dashboard, we are using the correct timezone (+8)

Not the timezone, the time is important. If your clock is some time behind or in the future it wont work.

 

[Trendal]

Did this get resolved? Facing the same issue

 

[NikosK_3CX]

@Trendal, you may raise your issue with https://www.3cx.com/contact/ in order to assist you.

 

[Alphabetic]

Have you got multiple NICs?

The IP sending the mail must match the one of your 3CX FQDN or you can get this error too.

Id try verbose logging and check management console log for the email event.

 

[KyriacosS_3CX]

@Trendal , I believe this was resolved via a support ticket for you?