diff --git a/beaglebone.txt b/beaglebone.txt
index a6b8b998..9aa7f499 100644
--- a/beaglebone.txt
+++ b/beaglebone.txt
@@ -7351,6 +7351,14 @@ GRANT ALL PRIVILEGES ON redmatrix.* TO 'redmatrixadmin'@'localhost';
 quit
 mysql -u root -p redmatrix -o < /var/backups/redmatrix_daily.sql
 #+END_SRC
+
+Since IMAP seems entangled with mysql it may also be necessary to reinstall Exim and Dovecot.
+
+#+BEGIN_SRC: bash
+apt-get remove --purge exim4\*
+#+END_SRC
+
+Then follow the instructions in [[Install Email]], [[Spam filtering]] and [[Install Dovecot]].
 ** Regenerating SSL certificates
 If a security vulnerability arrises which requires you to regenerate your SSL certificates, such as [[http://filippo.io/Heartbleed]["heartbleed"]], then this can be done as follows: