diff --git a/modoboa_installer/scripts/files/automx/automx.conf.tpl b/modoboa_installer/scripts/files/automx/automx.conf.tpl
index 7f66272..d69a792 100644
--- a/modoboa_installer/scripts/files/automx/automx.conf.tpl
+++ b/modoboa_installer/scripts/files/automx/automx.conf.tpl
@@ -21,6 +21,7 @@ smtp_server = %hostname
 smtp_port = 587
 smtp_encryption = starttls
 smtp_auth = plaintext
+smtp_auth_identity = ${email}
 smtp_refresh_ttl = 6
 smtp_default = yes
 
@@ -29,6 +30,7 @@ imap_server = %hostname
 imap_port = 143
 imap_encryption = starttls
 imap_auth = plaintext
+imap_auth_identity = ${email}
 imap_refresh_ttl = 6
 
 pop = yes
@@ -36,3 +38,4 @@ pop_server = %hostname
 pop_port = 110
 pop_encryption = starttls
 pop_auth = plaintext
+pop_auth_identity = ${email}