Re: [exim-dev] [Bug 2855] $sender_host_address doesn't work well with hybrid (v4mapped) IPv4 representation

Sat, 15 Jan 2022 02:57:54 -0800 

https://bugs.exim.org/show_bug.cgi?id=2855#c4

--- a/src/src/spool_out.c
+++ b/src/src/spool_out.c
@@ -185,7 +185,7 @@ if (sender_helo_name) spool_var_write(fp, US"helo_name", 
sender_helo_name);
 if (sender_host_address)
   {
   if (is_tainted(sender_host_address)) putc('-', fp);
-  fprintf(fp, "-host_address %s.%d\n", sender_host_address, sender_host_port);
+  fprintf(fp, "-host_address [%s]:%d\n", sender_host_address, 
sender_host_port);
   if (sender_host_name)
     spool_var_write(fp, US"host_name", sender_host_name);
   }

is a possible fix, but needs to pass the testsuite

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