fix(mail): 统一邮箱查询的大小写与别名匹配

- 将 Postfix/Dovecot 的 SQL 查询改为忽略大小写匹配，减少地址大小写导致的投递失败。
- 支持带 `+` 的详细地址解析，并基于域表关联定位邮箱目录。
- 启用 `lda_mailbox_autocreate`，确保投递到详细邮箱时可自动创建邮箱目录。

deploy/dovecot/dovecot-sql.conf.ext

@@ -2,4 +2,4 @@ driver = sqlite
 connect = /data/lanqin.db
 default_pass_scheme = BLF-CRYPT
 password_query = SELECT address AS user, password_hash AS password FROM mailboxes WHERE address = '%u' AND status = 'active'
-user_query = SELECT '/var/mail/vhosts/' || substr(address, instr(address, '@') + 1) || '/' || local_part AS home, 'maildir:/var/mail/vhosts/' || substr(address, instr(address, '@') + 1) || '/' || local_part || '/Maildir' AS mail, 5000 AS uid, 5000 AS gid FROM mailboxes WHERE address = '%u' AND status = 'active' UNION SELECT '/var/mail/vhosts/' || substr('%u', instr('%u', '@') + 1) || '/__unregistered__' AS home, 'maildir:/var/mail/vhosts/' || substr('%u', instr('%u', '@') + 1) || '/__unregistered__/Maildir' AS mail, 5000 AS uid, 5000 AS gid WHERE EXISTS (SELECT 1 FROM system_settings WHERE key='catchAllEnabled' AND value='true') AND EXISTS (SELECT 1 FROM domains WHERE name=substr('%u', instr('%u', '@') + 1) AND status='active') AND NOT EXISTS (SELECT 1 FROM mailboxes WHERE address='%u' AND status='active')
+user_query = SELECT '/var/mail/vhosts/' || d.name || '/' || m.local_part AS home, 'maildir:/var/mail/vhosts/' || d.name || '/' || m.local_part || '/Maildir' AS mail, 5000 AS uid, 5000 AS gid FROM mailboxes m JOIN domains d ON d.id=m.domain_id WHERE d.name=lower(substr('%u', instr('%u', '@') + 1)) AND m.local_part=lower(CASE WHEN instr(substr('%u', 1, instr('%u', '@') - 1), '+') > 0 THEN substr(substr('%u', 1, instr('%u', '@') - 1), 1, instr(substr('%u', 1, instr('%u', '@') - 1), '+') - 1) ELSE substr('%u', 1, instr('%u', '@') - 1) END) AND m.status='active' AND d.status='active' UNION SELECT '/var/mail/vhosts/' || lower(substr('%u', instr('%u', '@') + 1)) || '/__unregistered__' AS home, 'maildir:/var/mail/vhosts/' || lower(substr('%u', instr('%u', '@') + 1)) || '/__unregistered__/Maildir' AS mail, 5000 AS uid, 5000 AS gid WHERE EXISTS (SELECT 1 FROM system_settings WHERE key='catchAllEnabled' AND value='true') AND EXISTS (SELECT 1 FROM domains WHERE name=lower(substr('%u', instr('%u', '@') + 1)) AND status='active') AND NOT EXISTS (SELECT 1 FROM mailboxes m JOIN domains d ON d.id=m.domain_id WHERE d.name=lower(substr('%u', instr('%u', '@') + 1)) AND m.local_part=lower(CASE WHEN instr(substr('%u', 1, instr('%u', '@') - 1), '+') > 0 THEN substr(substr('%u', 1, instr('%u', '@') - 1), 1, instr(substr('%u', 1, instr('%u', '@') - 1), '+') - 1) ELSE substr('%u', 1, instr('%u', '@') - 1) END) AND m.status='active')

deploy/dovecot/dovecot.conf

@@ -69,5 +69,6 @@ service auth {
 protocol lmtp {
   postmaster_address = postmaster@localhost
   recipient_delimiter = +
+  lda_mailbox_autocreate = yes
   lmtp_save_to_detail_mailbox = yes
 }

deploy/postfix/sqlite-aliases.cf

@@ -1,2 +1,2 @@
 dbpath = /data/lanqin.db
-query = SELECT destination FROM aliases WHERE source='%s' AND enabled=1 UNION SELECT address FROM mailboxes WHERE address='%s' AND status='active'
+query = SELECT destination FROM aliases WHERE lower(source)=lower('%s') AND enabled=1 UNION SELECT address FROM mailboxes WHERE lower(address)=lower('%s') AND status='active'

deploy/postfix/sqlite-mailboxes.cf

@@ -1,2 +1,2 @@
 dbpath = /data/lanqin.db
-query = SELECT 'vhosts/' || substr(address, instr(address, '@') + 1) || '/' || local_part || '/Maildir/' FROM mailboxes WHERE address='%s' AND status='active' UNION SELECT 'vhosts/' || substr('%s', instr('%s', '@') + 1) || '/__unregistered__/Maildir/' WHERE EXISTS (SELECT 1 FROM system_settings WHERE key='catchAllEnabled' AND value='true') AND EXISTS (SELECT 1 FROM domains WHERE name=substr('%s', instr('%s', '@') + 1) AND status='active') AND NOT EXISTS (SELECT 1 FROM mailboxes WHERE address='%s' AND status='active')
+query = SELECT 'vhosts/' || d.name || '/' || m.local_part || '/Maildir/' FROM mailboxes m JOIN domains d ON d.id=m.domain_id WHERE d.name=lower(substr('%s', instr('%s', '@') + 1)) AND m.local_part=lower(CASE WHEN instr(substr('%s', 1, instr('%s', '@') - 1), '+') > 0 THEN substr(substr('%s', 1, instr('%s', '@') - 1), 1, instr(substr('%s', 1, instr('%s', '@') - 1), '+') - 1) ELSE substr('%s', 1, instr('%s', '@') - 1) END) AND m.status='active' AND d.status='active' UNION SELECT 'vhosts/' || lower(substr('%s', instr('%s', '@') + 1)) || '/__unregistered__/Maildir/' WHERE EXISTS (SELECT 1 FROM system_settings WHERE key='catchAllEnabled' AND value='true') AND EXISTS (SELECT 1 FROM domains WHERE name=lower(substr('%s', instr('%s', '@') + 1)) AND status='active') AND NOT EXISTS (SELECT 1 FROM mailboxes m JOIN domains d ON d.id=m.domain_id WHERE d.name=lower(substr('%s', instr('%s', '@') + 1)) AND m.local_part=lower(CASE WHEN instr(substr('%s', 1, instr('%s', '@') - 1), '+') > 0 THEN substr(substr('%s', 1, instr('%s', '@') - 1), 1, instr(substr('%s', 1, instr('%s', '@') - 1), '+') - 1) ELSE substr('%s', 1, instr('%s', '@') - 1) END) AND m.status='active')

deploy/postfix/sqlite-sender-bcc.cf

@@ -1,2 +1,2 @@
 dbpath = /data/lanqin.db
-query = SELECT local_part || '+Sent@' || substr(address, instr(address, '@') + 1) FROM mailboxes WHERE address='%s' AND status='active'
+query = SELECT local_part || '+Sent@' || substr(address, instr(address, '@') + 1) FROM mailboxes WHERE lower(address)=lower('%s') AND status='active'