[evolution] I#749 - Reword text in Read Receipt message

[Milan Crha <mcrha src gnome org>]

commit e0d02a299ded8ab986a87d6576550b91439d567c
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jan 13 18:32:57 2020 +0100

    I#749 - Reword text in Read Receipt message
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/749

 src/modules/mdn/evolution-mdn.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/src/modules/mdn/evolution-mdn.c b/src/modules/mdn/evolution-mdn.c
index e3b57eb1c5..1c009f8044 100644
--- a/src/modules/mdn/evolution-mdn.c
+++ b/src/modules/mdn/evolution-mdn.c
@@ -305,7 +305,7 @@ mdn_notify_sender (ESource *identity_source,
        content = g_strdup_printf (
                /* Translators: First %s is an email address, second %s
                 * is the subject of the email, third %s is the date. */
-               _("Your message to %s about “%s” on %s has been read."),
+               _("Your message to %s about “%s” on %s has been displayed. This is no guarantee that the 
message has been read or understood."),
                self_address, message_subject, message_date);
        stream = camel_stream_mem_new ();
        camel_stream_write_string (stream, content, NULL, NULL);
@@ -370,8 +370,10 @@ mdn_notify_sender (ESource *identity_source,
        g_object_unref (body);
 
        receipt_subject = g_strdup_printf (
-               /* Translators: %s is the subject of the email message. */
-               _("Delivery Notification for “%s”"), message_subject);
+               /* Translators: %s is the subject of the email message This text is used as
+                  a subject of a delivery notification email (basically a notification, that
+                  the user did read (or better displayed) the message). */
+               _("Read: %s"), message_subject);
        camel_mime_message_set_subject (receipt, receipt_subject);
        g_free (receipt_subject);