I have a single mailbox mail server running Dovecot/Postfix and I have two IMAP clients, Thunderbird on the PC and K9 on Android. I keep on receiving this error in my logs even after I change the 'mail_max_userip_connections' variable to 50.

puppet dovecot: imap-login: Maximum number of connections from user+IP exceeded (mail_max_userip_connections=10): user=<[email protected]>, method=PLAIN, rip=62.242.90.2, lip=198.29.31.229, TLS

Why does it say that it is set to 10 in the log? Is that hardcoded?

grep -r "mail_max_userip_connections" /etc/dovecot
/etc/dovecot/conf.d/20-managesieve.conf:  #mail_max_userip_connections = 10
/etc/dovecot/conf.d/20-pop3.conf:  #mail_max_userip_connections = 3
/etc/dovecot/conf.d/20-imap.conf:  mail_max_userip_connections = 50

I've restarted dovecot after making the changes but this error is still logged and I can't access the mailbox. Can anyone help me understand why I can't seem to raise the maximum limit?