diff -urNp -x '*.orig' slrn-1.0.3.org/doc/slrn.rc slrn-1.0.3/doc/slrn.rc
--- slrn-1.0.3.org/doc/slrn.rc	2016-10-24 00:34:16.000000000 +0200
+++ slrn-1.0.3/doc/slrn.rc	2021-10-03 22:48:59.521057945 +0200
@@ -219,6 +219,11 @@
 % display all the "X-"headers except "X-Trace:").
 %visible_headers "From:,Subject:,Newsgroups:,Followup-To:,Reply-To:"
 
+% If non-zero, visible headers are displayed in specific order.
+% If 1, headers are arranged with respect to visible_headers order put above,
+% If 2, the same as above with multiple matches sorted alphabetically.
+%set visible_headers_sorting_method 2
+
 % If non-zero, #v+ and #v- will be interpreted as markers of verbatim lines.
 %set process_verbatim_marks 1
 
diff -urNp -x '*.orig' slrn-1.0.3.org/src/art.h slrn-1.0.3/src/art.h
--- slrn-1.0.3.org/src/art.h	2016-10-24 00:34:16.000000000 +0200
+++ slrn-1.0.3/src/art.h	2021-10-03 22:48:59.521057945 +0200
@@ -46,6 +46,7 @@ extern int Slrn_Query_Next_Group;
 extern int Slrn_Auto_CC_To_Poster;
 extern int Slrn_Score_After_XOver;
 extern int Slrn_Use_Tmpdir;
+extern int Slrn_Visible_Headers_Sorting_Mode;
 extern int Slrn_Wrap_Mode;
 extern int Slrn_Wrap_Width;
 extern int Slrn_Wrap_Method;
diff -urNp -x '*.orig' slrn-1.0.3.org/src/art_misc.c slrn-1.0.3/src/art_misc.c
--- slrn-1.0.3.org/src/art_misc.c	2016-10-24 00:34:16.000000000 +0200
+++ slrn-1.0.3/src/art_misc.c	2021-10-03 22:48:59.524391275 +0200
@@ -65,6 +65,8 @@ int Slrn_Wrap_Width = -1;
 
 static char *Super_Cite_Regexp = "^[^A-Za-z0-9]*\"\\([-_a-zA-Z/]+\\)\" == .+";
 
+int Slrn_Visible_Headers_Sorting_Mode = 2;
+
 static void hide_article_lines (Slrn_Article_Type *a, unsigned int mask) /*{{{*/
 {
    Slrn_Article_Line_Type *l;
@@ -935,6 +937,157 @@ void _slrn_art_unhide_headers (Slrn_Arti
 
 /*}}}*/
 
+void _slrn_sort_visible_headers (Slrn_Article_Type *a) /*{{{*/
+{
+   Slrn_Article_Line_Type *l, *lnext, *sorted, *sorted_last;
+   Slrn_Article_Line_Type *sorted_headers, *sorted_headers_last;
+   Visible_Header_Type *sortpos, *sortpos_better;
+   int is_better_match, sort_again;
+   char *colon, *colon_next;
+
+   if (Slrn_Visible_Headers_Sorting_Mode < 1) return;
+
+   sorted_headers = NULL;
+   sorted_headers_last = NULL;
+   sortpos = Visible_Headers;
+   
+   while (sortpos != NULL)
+     {
+	l = a->lines;
+	sorted = NULL;
+	sorted_last = NULL;
+		
+	while ((l != NULL) && (l->flags & HEADER_LINE))
+	  {
+	     lnext = l->next;
+	     if (0 == slrn_case_strncmp ((unsigned char *)l->buf,
+					 (unsigned char *)sortpos->header,
+					 sortpos->len))
+	       {
+		  sortpos_better = sortpos->next;
+		  is_better_match = 0;
+		  while ((sortpos_better != NULL) && (is_better_match == 0))
+		    {
+		       if (0 == slrn_case_strncmp ((unsigned char *)l->buf,
+						   (unsigned char *)sortpos_better->header,
+						   sortpos_better->len))
+			 {
+			    if (sortpos_better->len >= sortpos->len)
+			      is_better_match = 1;
+			 }
+		       sortpos_better = sortpos_better->next;
+		    }
+		  
+		  if (is_better_match == 0)
+		    {
+		       if (l->prev != NULL)
+			 l->prev->next = l->next;
+		       else
+			 a->lines = l->next;
+
+		       if (l->next != NULL)
+			 l->next->prev = l->prev;
+
+		       if (sorted == NULL)
+			 sorted = l;
+		       else
+			 {
+			    sorted_last->next = l;
+			    l->prev = sorted_last;
+			 }
+		       sorted_last = l;
+		    }
+	       }
+	     l = lnext;
+	  }
+    
+	if (Slrn_Visible_Headers_Sorting_Mode > 1)
+	  {
+	     if (sorted != sorted_last)
+	       {
+		  sort_again = 1;
+		  while (sort_again)
+		    {
+		       sort_again = 0;
+		       sorted->prev = NULL;
+		       sorted_last->next = NULL;
+		       l = sorted;
+		       while (l != sorted_last)
+			 {
+			    lnext = l->next;
+
+			    colon = slrn_strbyte (l->buf, ':');
+			    if (colon != NULL)
+			      *colon = 0;
+			    
+			    colon_next = slrn_strbyte (lnext->buf, ':');
+			    if (colon_next != NULL)
+			      *colon_next = 0;
+			    
+			    if (0 < slrn_case_strcmp ((unsigned char *)l->buf,
+						      (unsigned char *)lnext->buf))
+			      {
+				 sort_again = 1;
+				 if (l->prev != NULL)
+				   l->prev->next = lnext;
+				 else
+				   sorted = lnext;
+				 
+				 lnext->prev = l->prev;
+				 l->prev = lnext;
+				 l->next = lnext->next;
+				 lnext->next = l;
+				 if (l->next != NULL)
+				   l->next->prev = l;
+				 else
+				   sorted_last = l;
+				 
+				 lnext = l;
+			      }
+
+			    if (colon != NULL)
+			      *colon = ':';
+
+			    if (colon_next != NULL)
+			      *colon_next = ':';
+			    
+			    l = lnext;
+			 }
+		    }
+	       }
+	  }
+	
+	if (sorted != NULL)
+	  {
+	     if (sorted_headers == NULL)
+	       {
+		  sorted_headers = sorted;
+		  sorted_headers_last = sorted_last;
+	       }
+	     else
+	       {
+		  sorted_headers->prev = sorted_last;
+		  sorted_last->next = sorted_headers;
+		  sorted_headers = sorted;     
+	       }
+	  }
+	sortpos = sortpos->next;
+     }
+   
+   if (sorted_headers != NULL)
+     {
+	sorted_headers_last->next = a->lines;
+	a->lines->prev = sorted_headers_last;
+	a->lines = sorted_headers;
+	a->cline = sorted_headers;
+	sorted_headers->prev = NULL;
+     }
+
+   return;
+}
+
+/*}}}*/
+
 int _slrn_art_unfold_header_lines (Slrn_Article_Type *a) /*{{{*/
 {
    Slrn_Article_Line_Type *l;
@@ -979,6 +1132,9 @@ int _slrn_art_unfold_header_lines (Slrn_
 
 	l = l->next;
      }
+   
+   _slrn_sort_visible_headers (a);
+   
    return 0;
 }
 
diff -urNp -x '*.orig' slrn-1.0.3.org/src/startup.c slrn-1.0.3/src/startup.c
--- slrn-1.0.3.org/src/startup.c	2021-10-03 22:48:59.367724784 +0200
+++ slrn-1.0.3/src/startup.c	2021-10-03 22:48:59.524391275 +0200
@@ -626,6 +626,7 @@ Slrn_Int_Var_Type Slrn_Int_Variables []
      {"cc_followup", &Slrn_Auto_CC_To_Poster, NULL},
      {"use_tmpdir", &Slrn_Use_Tmpdir, NULL},
      {"sorting_method", &Slrn_Sorting_Mode, NULL},
+     {"visible_headers_sorting_method", &Slrn_Visible_Headers_Sorting_Mode},
      {"custom_sort_by_threads", &Slrn_Sort_By_Threads, NULL},
      {"uncollapse_threads", &Slrn_Uncollapse_Threads, NULL},
      {"read_active", &Slrn_List_Active_File, NULL},