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Error :”551 5.1.1 recipient is not exist”

Introduction When sending outbound emails, you may receive a bounce-back error indicating that the recipient address is invalid or not found. A typical example of this error is: Error: A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: SMTP

FAQ: Is the C1–100Mbit/s network exclusive?

Is the C1–100Mbit/s network exclusive? Yes, the C1–100Mbit/s network is included, providing access to a high-speed network as part of the service. For more details on network performance and availability, please contact sales team via email to sales@ipserverone.com or provide your details at https://www.ipserverone.com/contact-us-via-chat/ .

FAQ: We are considering upgrading to a Bare Metal Server Pro with IPServerOne. What operating systems are available? Specifically, do you offer Debian 12 or newer and Ubuntu 24.04 or newer?

We are considering upgrading to a Bare Metal Server Pro with IPServerOne. What operating systems are available? Specifically, do you offer Debian 12 or newer and Ubuntu 24.04 or newer? Here is the list of operating systems we currently offer: AlmaLinux RockyLinux Debian Fedora FreeBSD Ubuntu Windows CloudLinux Both Debian and Ubuntu are supported and

How do I book the CJ1 loading bay?

Booking the CJ1 Loading Bay How do I book the CJ1 loading bay? To book the loading bay at IP ServerOne’s CJ1 Data Center in Cyberjaya, please follow these steps: Submit a Visitation Request: Log in to your IP ServerOne customer portal. Navigate to the Data Center tab and select Visitation Request. Complete the form