diff -urN ../exim-4.95.orig/src/tls-gnu.c ./src/tls-gnu.c
--- ../exim-4.95.orig/src/tls-gnu.c	2021-09-28 11:24:46.000000000 +0300
+++ ./src/tls-gnu.c	2022-02-17 13:10:07.845371000 +0200
@@ -3730,6 +3730,11 @@
 
   tls_write(ct_ctx, NULL, 0, FALSE);	/* flush write buffer */
 
+#ifdef EXIM_TCP_CORK
+  if (do_shutdown > 1)
+    (void) setsockopt(tlsp->active.sock, IPPROTO_TCP, EXIM_TCP_CORK, US &off, sizeof(off));
+#endif
+
   ALARM(2);
   gnutls_bye(state->session, do_shutdown > 1 ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR);
   ALARM_CLR(0);
diff -urN ../exim-4.95.orig/src/tls-openssl.c ./src/tls-openssl.c
--- ../exim-4.95.orig/src/tls-openssl.c	2021-09-28 11:24:46.000000000 +0300
+++ ./src/tls-openssl.c	2022-02-17 13:10:16.479271000 +0200
@@ -4393,6 +4393,9 @@
   if (  (rc = SSL_shutdown(*sslp)) == 0	/* send "close notify" alert */
      && do_shutdown > 1)
     {
+#ifdef EXIM_TCP_CORK
+    (void) setsockopt(*fdp, IPPROTO_TCP, EXIM_TCP_CORK, US &off, sizeof(off));
+#endif
     ALARM(2);
     rc = SSL_shutdown(*sslp);		/* wait for response */
     ALARM_CLR(0);