Hi.
When a catch-all entry (@) is used in a virtual alias table, it
eventually (and mistakenly) catches everything that expands to a
username. For example, with:
f...@example.com user
@ catchall
"f...@example.com" expands to "user" as expected, but then "user"
expands to "catchall" because it is interpreted as "user@" (empty
domain).
The catch-all fallback mechanism is really meant for full email
addresses in virtual context, and should not happen for usernames.
The following diff fixes it.
Eric.
Index: aliases.c
===================================================================
RCS file: /cvs/src/usr.sbin/smtpd/aliases.c,v
retrieving revision 1.77
diff -u -p -r1.77 aliases.c
--- aliases.c 28 Dec 2018 12:47:28 -0000 1.77
+++ aliases.c 26 Apr 2020 16:04:51 -0000
@@ -164,6 +164,10 @@ aliases_virtual_get(struct expand *expan
if (ret)
goto expand;
+ /* Do not try catch-all entries if there is no domain */
+ if (domain[0] == '\0')
+ return 0;
+
if (!bsnprintf(buf, sizeof(buf), "@%s", domain))
return 0;
/* Failed ? We lookup for catch all for virtual domain */
