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-# vpopmail
-Vpopmail is a set of programs for creating and managing multiple virtual domains on a qmail server, with full support for many POP/IMAP servers
+# `vpopmail`
+
+Vpopmail is a set of programs for creating and managing multiple virtual domains on a qmail server,
+with full support for many POP/IMAP servers
+
+## Upgrading from version 5.4.33
+
+When upgrading from version 5.4.33 to version 5.6.x, if you have the accounts on SQL, you should
+enlarge the `vpopmail.pw_passwd` column size, as the default password encryption is SHA512, which is
+longer than the old MD5; you can disable SHA512 pwd with `--disable-sha512-passwords` at configure time.
+The default dimension for the `vpopmail.pw_passwd` column is now 128.  
+Here is the SQL query to upgrade the `vpopmail` table:
+
+``` sql
+ALTER TABLE `vpopmail` CHANGE `pw_passwd` `pw_passwd` VARCHAR(128) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL;
+```
+
+Several other non breaking changes have been made to the `MySQL` tables' layout.  
+Here is how you can quickly alter the tables (inlcluded the change mentioned above):
+
+``` sql
+/* vpopmail */
+ALTER TABLE `vpopmail` CHANGE `pw_name` `pw_name` VARCHAR(64) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL; 
+ALTER TABLE `vpopmail` CHANGE `pw_domain` `pw_domain` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL; 
+ALTER TABLE `vpopmail` CHANGE `pw_passwd` `pw_passwd` VARCHAR(128) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL;
+ALTER TABLE `vpopmail` CHANGE `pw_gecos` `pw_gecos` VARCHAR(64) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL;
+ALTER TABLE `vpopmail` CHANGE `pw_dir` `pw_dir` VARCHAR(160) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL;
+ALTER TABLE `vpopmail` CHANGE `pw_shell` `pw_shell` VARCHAR(20) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL; 
+
+/* vlog */
+ALTER TABLE `vlog` CHANGE `user` `user` VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL; 
+ALTER TABLE `vlog` CHANGE `passwd` `passwd` VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL;
+ALTER TABLE `vlog` CHANGE `domain` `domain` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL; 
+ALTER TABLE `vlog` CHANGE `remoteip` `remoteip` VARCHAR(39) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL; 
+ALTER TABLE `vlog` CHANGE `error` `error` TINYINT(1) NULL DEFAULT NULL;
+ALTER TABLE `vlog` CHANGE `timestamp` `timestamp` INT NOT NULL DEFAULT '0'; 
+
+/* lastauth */
+ALTER TABLE `lastauth` CHANGE `user` `user` VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL; 
+ALTER TABLE `lastauth` CHANGE `domain` `domain` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL; 
+ALTER TABLE `lastauth` CHANGE `remote_ip` `remote_ip` VARCHAR(39) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;
+ALTER TABLE `lastauth` CHANGE `timestamp` `timestamp` INT NOT NULL DEFAULT '0'; 
+
+/* limits */
+ALTER TABLE `limits` CHANGE `domain` `domain` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL; 
+
+/* alias */
+ALTER TABLE `valias` CHANGE `alias` `alias` VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;
+ALTER TABLE `valias` CHANGE `domain` `domain` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;
+
+/* dir_control */
+ALTER TABLE `dir_control` CHANGE `domain` `domain` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;
+
+/* aliasdomains */
+ALTER TABLE `aliasdomains` CHANGE `alias` `alias` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;
+ALTER TABLE `aliasdomains` CHANGE `domain` `domain` VARCHAR(96) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL; 
+```
 
 ## More info and support
+
 To find more info and ask for support post a comment in [my blog](https://notes.sagredo.eu/en/qmail-notes-185/installing-and-configuring-vpopmail-81.html).