be able to update data individually; Fixes #951

src/model/mail.rs

@@ -3,7 +3,7 @@ use std::{error::Error, fs};
 use lettre::{
     message::{header::ContentType, Attachment, MultiPart, SinglePart},
     transport::smtp::authentication::Credentials,
-    Message, SmtpTransport, Transport,
+    Address, Message, SmtpTransport, Transport,
 };
 use sqlx::{Sqlite, SqlitePool, Transaction};
 
@@ -374,3 +374,13 @@ Der Vorstand");
         }
     }
 }
+
+pub(crate) fn valid_mails(mails: &str) -> bool {
+    let splitted = mails.split(',');
+    for single_rec in splitted {
+        if single_rec.parse::<Address>().is_err() {
+            return false;
+        }
+    }
+    true
+}