melib/backends: add extra_submission_headers field in MailBackendCapabilities struct

Signed-off-by: Manos Pitsidianakis <manos@pitsidianak.is>

melib/src/backends.rs

@@ -37,7 +37,7 @@ use super::email::{Envelope, EnvelopeHash, Flag};
 use crate::{
     conf::AccountSettings,
     error::{Error, ErrorKind, Result},
-    LogLevel,
+    HeaderName, LogLevel,
 };
 
 #[macro_export]
@@ -328,6 +328,7 @@ pub struct MailBackendCapabilities {
     pub supports_search: bool,
     pub supports_tags: bool,
     pub supports_submission: bool,
+    pub extra_submission_headers: &'static [HeaderName],
 }
 
 #[derive(Debug, Copy, Clone)]

melib/src/imap/mod.rs

@@ -292,6 +292,7 @@ impl MailBackend for ImapType {
             extensions: Some(extensions),
             supports_tags: true,
             supports_submission: false,
+            extra_submission_headers: &[],
         }
     }
 

melib/src/jmap/mod.rs

@@ -299,6 +299,7 @@ impl MailBackend for JmapType {
             extensions: None,
             supports_tags: true,
             supports_submission: true,
+            extra_submission_headers: &[],
         };
         let supports_submission: bool = self
             .store

melib/src/maildir/backend.rs

@@ -186,6 +186,7 @@ impl MailBackend for MaildirType {
             extensions: None,
             supports_tags: false,
             supports_submission: false,
+            extra_submission_headers: &[],
         };
         CAPABILITIES
     }

melib/src/mbox/mod.rs

@@ -836,6 +836,7 @@ impl MailBackend for MboxType {
             extensions: None,
             supports_tags: false,
             supports_submission: false,
+            extra_submission_headers: &[],
         };
         CAPABILITIES
     }

melib/src/nntp/mod.rs

@@ -217,6 +217,7 @@ impl MailBackend for NntpType {
             extensions: Some(extensions),
             supports_tags: false,
             supports_submission,
+            extra_submission_headers: &[HeaderName::NEWSGROUPS],
         }
     }
 

melib/src/notmuch/mod.rs

@@ -603,6 +603,7 @@ impl MailBackend for NotmuchDb {
             extensions: None,
             supports_tags: true,
             supports_submission: false,
+            extra_submission_headers: &[],
         };
         CAPABILITIES
     }