diff --git a/Dovecot/conf.d/15-lda.conf b/Dovecot/conf.d/15-lda.conf
index a18f238..56e333c 100644
--- a/Dovecot/conf.d/15-lda.conf
+++ b/Dovecot/conf.d/15-lda.conf
@@ -4,7 +4,7 @@
 
 # Address to use when sending rejection mails.
 # Default is postmaster@<your domain>. %d expands to recipient domain.
-postmaster_address = postmaster
+postmaster_address = postmaster@libraryofcode.org
 
 # Hostname to use in various parts of sent mails (e.g. in Message-Id) and
 # in LMTP replies. Default is the system's real hostname@domain.