Maddy does not support "UidPlus"?

[HubKing]

I am using C# and the MailKit library to delete e-mails in the IMAP server. The sample code is

if (client.Capabilities.HasFlag (ImapCapabilities.UidPlus))
    client.Inbox.Expunge (new UniqueId[] { uid });

but the capabilities I get is MailKit.Net.Imap.ImapCapabilities.IMAP4rev1 | MailKit.Net.Imap.ImapCapabilities.Status | MailKit.Net.Imap.ImapCapabilities.LiteralPlus | MailKit.Net.Imap.ImapCapabilities.Idle | MailKit.Net.Imap.ImapCapabilities.Namespace | MailKit.Net.Imap.ImapCapabilities.Children | MailKit.Net.Imap.ImapCapabilities.Unselect | MailKit.Net.Imap.ImapCapabilities.SaslIR | MailKit.Net.Imap.ImapCapabilities.Sort | MailKit.Net.Imap.ImapCapabilities.Thread | MailKit.Net.Imap.ImapCapabilities.I18NLevel | MailKit.Net.Imap.ImapCapabilities.Move | MailKit.Net.Imap.ImapCapabilities.AppendLimit, so, it seems that I cannot delete e-mails using the Expunge method.

Does Maddy really not support UidPlus, or have I misconfigured it? The documentation does not have anything when I searched it for "uid".

[foxcpp]

Yes, you are right. maddy does not support the UIDPLUS extension.

[HubKing]

I don't know much about IMAP, but as the author of MailKit says, I kind of feel it is unsafe to delete e-mails using their indices rather than unique ID's, because indices can change. I don't know why it was not designed to use unique ID's in the first place and only supports it through an "extension".