SolidCP does not work with TLS 1.2. It seems to be using older SSL or TLS 1.0 or TLS 1.1 ciphers.
Can you please add support for TLS 1.2 and TLS 1.3 in the future?
Here is the error when using TLS1.2 only on a Smartermail Server:
System.Web.Services.Protocols.SoapException: Server was unable to process request. —> Could not get mailbox —> The underlying connection was closed: An unexpected error occurred on a receive. —> The client and server cannot communicate, because they do not possess a common algorithm
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at SolidCP.EnterpriseServer.esMailServers.GetMailAccount(Int32 itemId)
at SolidCP.Portal.MailAccountsEditAccount.BindItem()