dovecot-dbg software package provides secure POP3/IMAP server - debug symbols, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dovecot-dbg
dovecot-dbg is installed in your system.
Make ensure the dovecot-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep dovecot-dbg *
You will get with dovecot-dbg package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Debug packages |
| Package | dovecot-dbg |
| Version | 1:2.2.24-1ubuntu1 |
| Description | secure POP3/IMAP server - debug symbols |
| Sub Section | debug |