diff -urN ../exim-4.92.orig/src/transports/lmtp.c ./src/transports/lmtp.c
--- ../exim-4.92.orig/src/transports/lmtp.c	2019-06-04 00:51:08.000000000 +0300
+++ ./src/transports/lmtp.c	2019-06-04 00:58:23.958679491 +0300
@@ -122,7 +122,7 @@
 Returns:       TRUE if a "QUIT" command should be sent, else FALSE
 */
 
-static BOOL
+BOOL
 check_response(int *errno_value, int more_errno, uschar *buffer,
   int *yield, uschar **message)
 {
@@ -221,7 +221,7 @@
 Returns:     TRUE if successful, FALSE if not, with errno set
 */
 
-static BOOL
+BOOL
 lmtp_write_command(int fd, const char *format, ...)
 {
 gstring gs = { .size = big_buffer_size, .ptr = 0, .s = big_buffer };
@@ -268,7 +268,7 @@
 Returns:    TRUE if a valid, non-error response was received; else FALSE
 */
 
-static BOOL
+BOOL
 lmtp_read_response(FILE *f, uschar *buffer, int size, int okdigit, int timeout)
 {
 int count;
diff -urN ../exim-4.92.orig/src/transports/lmtp.h ./src/transports/lmtp.h
--- ../exim-4.92.orig/src/transports/lmtp.h	2019-01-30 15:59:52.000000000 +0200
+++ ./src/transports/lmtp.h	2019-06-04 01:00:28.039514813 +0300
@@ -28,5 +28,8 @@
 
 extern BOOL lmtp_transport_entry(transport_instance *, address_item *);
 extern void lmtp_transport_init(transport_instance *);
+extern BOOL lmtp_write_command(int fd, const char *format, ...);
+extern BOOL lmtp_read_response(FILE *f, uschar *buffer, int size, int okdigit, int timeout);
+extern BOOL check_response(int *errno_value, int more_errno, uschar *buffer, int *yield, uschar **message);
 
 /* End of transports/lmtp.h */