Here's the mail it never fails

misc/mobile_40.asm

@@ -2523,7 +2523,7 @@ Unknown_100fc0: ; 100fc0
 	db -1
 
 Unknown_100feb: ; 100feb
-	dbwww $00, sPartyScratch1, SCRATCHMON_STRUCT_LENGTH * PARTY_LENGTH, NULL
+	dbwww $00, sPartyMail, MAIL_STRUCT_LENGTH * PARTY_LENGTH, NULL
 	db -1
 
 Unknown_100ff3: ; 100ff3

misc/mobile_46.asm

@@ -5842,7 +5842,7 @@ Function11ac3e: ; 11ac3e
 	call FadeToMenu
 	callab InefficientlyClear121BytesAtwc300
 	call Function11ac51
-	call Function2b3c
+	call ReturnToCallingMenu
 	ret
 ; 11ac51
 
@@ -7697,7 +7697,7 @@ Function11b7e5: ; 11b7e5
 	ld [de], a
 
 .asm_11b872
-	call Function2b3c
+	call ReturnToCallingMenu
 	call RestartMapMusic
 	ret
 ; 11b879
@@ -7919,7 +7919,7 @@ Function11b98f: ; 11b98f
 	call CopyBytes
 	ld a, "@"
 	ld [de], a
-	ld hl, sPartyScratch1
+	ld hl, sPartyMail
 	ld bc, PARTYMON_STRUCT_LENGTH - 1
 	ld a, [wcd2a]
 .loop5

misc/mobile_5c.asm

@@ -278,7 +278,7 @@ Function1704e1: ; 1704e1
 	call FadeToMenu
 	call Function17021e
 	call Function1704f1
-	call Function2b3c
+	call ReturnToCallingMenu
 	ret
 ; 1704f1
 

misc/mobile_5f.asm

@@ -324,7 +324,7 @@ Function17d0f3: ; 17d0f3
 	ld [de], a
 
 .asm_17d180
-	call Function2b3c
+	call ReturnToCallingMenu
 	call RestartMapMusic
 	ret
 ; 17d187
@@ -562,7 +562,7 @@ Function17d2ce: ; 17d2ce
 	ld [MusicFadeIDHi], a
 	call PlayMusic
 	call ReturnToMapFromSubmenu
-	call Function2b3c
+	call ReturnToCallingMenu
 	ret
 ; 17d314
 
@@ -4674,7 +4674,7 @@ Function17f53d: ; 17f53d
 	call Function17f555
 	pop af
 	ld [rSVBK], a
-	call Function2b4d
+	call ExitAllMenus
 	ret
 ; 17f555