--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dovecot/dovecot.conf	Mon Nov 10 21:14:26 2025 +0900
@@ -0,0 +1,110 @@
+## Dovecot configuration file
+
+listen = *, ::
+
+mail_plugin_dir = /usr/lib/dovecot
+base_dir = /var/run/dovecot
+instance_name = dovecot
+
+protocols = imap lmtp pop3
+
+# TLS stuff
+ssl = yes
+ssl_cert = </etc/letsencrypt/live/example.net/fullchain.pem
+ssl_key = </etc/letsencrypt/live/example.net/privkey.pem
+
+# Authentication
+auth_mechanisms = plain login
+auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@
+auth_username_format = %n
+disable_plaintext_auth = no
+
+# Valid users
+first_valid_uid = 143
+last_valid_uid = 1003
+first_valid_gid = 6
+last_valid_gid = 1008
+
+lda_mailbox_autocreate = yes
+imap_capability = +SPECIAL-USE
+
+# Hostname
+hostname = example.net
+
+# PostgreSQL UserDB
+#userdb {
+#	driver = sql
+#	args = /etc/dovecot/pgsql.conf
+#}
+
+#passdb {
+#	driver = sql
+#	args = /etc/dovecot/pgsql.conf
+#}
+
+protocol lmtp {
+	mail_plugins = $mail_plugins sieve
+}
+
+service auth {
+        unix_listener auth-userdb {
+                mode = 0660
+                user = dovecot
+                group = mail
+        }
+}
+
+passdb {
+  driver = pam
+}
+
+userdb {
+  driver = passwd
+}
+
+service lmtp {
+        unix_listener lmtp {
+                mode = 0660
+                user = dovecot
+                group = mail
+        }
+}
+
+
+# Mailbox
+mail_location = maildir:~/Maildir
+mailbox_list_index = yes
+mail_uid = dovecot
+mail_gid = dovecot
+
+namespace inbox {
+	type = private
+	inbox = yes
+	mailbox Archive {
+		special_use = \Archive
+		auto = create
+	}
+	mailbox Drafts {
+		special_use = \Drafts
+		auto = create
+	}
+	mailbox Sent {
+		special_use = \Sent
+		auto = create
+	}
+	mailbox Junk {
+		special_use = \Junk
+		auto = create
+		autoexpunge = 30d
+	}
+	mailbox Trash {
+		special_use = \Trash
+		auto = create
+		autoexpunge = 7d
+	}
+}
+
+plugin {
+	sieve = yes
+	sieve_after = /etc/dovecot/sieve
+}