diff -urN ../exim-4.94.2.orig/src/smtp_in.c ./src/smtp_in.c
--- ../exim-4.94.2.orig/src/smtp_in.c	2021-04-30 15:08:21.000000000 +0300
+++ ./src/smtp_in.c	2021-11-20 00:24:15.349712000 +0200
@@ -3006,7 +3006,21 @@
     if (tls_server_start(tls_require_ciphers, &user_msg) != OK)
       return smtp_log_tls_fail(user_msg);
     cmd_list[CMD_LIST_TLS_AUTH].is_mail_cmd = TRUE;
+
+if (raw_active_hostname != NULL)
+  {
+  uschar *nah = expand_string(raw_active_hostname);
+  if (nah == NULL)
+    {
+    if (!f.expand_string_forcedfail)
+      log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
+        "(smtp_active_hostname): %s", raw_active_hostname,
+        expand_string_message);
     }
+  else if (nah[0] != 0) smtp_active_hostname = nah;
+  }
+
+    }
 #endif
 
 /* Run the connect ACL if it exists */
@@ -5584,6 +5598,20 @@
       s = NULL;
       if ((rc = tls_server_start(tls_require_ciphers, &s)) == OK)
 	{
+
+if (raw_active_hostname != NULL)
+  {
+  uschar *nah = expand_string(raw_active_hostname);
+  if (nah == NULL)
+    {
+    if (!f.expand_string_forcedfail)
+      log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
+        "(smtp_active_hostname): %s", raw_active_hostname,
+        expand_string_message);
+    }
+  else if (nah[0] != 0) smtp_active_hostname = nah;
+  }
+
 	if (!tls_remember_esmtp)
 	  fl.helo_seen = fl.esmtp = fl.auth_advertised = f.smtp_in_pipelining_advertised = FALSE;
 	cmd_list[CMD_LIST_EHLO].is_mail_cmd = TRUE;