我正在尝试在 godaddy vps ubuntu 16 os 上安装 dovecot，我已经安装了带有智能主机的 postfix，因为 godaddy 可以使用中继服务器发送电子邮件
当我安装 Dovecot 时，出现了下面的错误，不知道该怎么办，研究了很多文章，但还是没能解决问题
root@s50-63-165-53:/home/leadshorizon# systemctl status dovecot.service
● dovecot.service - Dovecot IMAP/POP3 email server
Loaded: loaded (/lib/systemd/system/dovecot.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2018-07-20 09:10:02 MST; 3min 29s ago
Docs: man:dovecot(1)
http://wiki2.dovecot.org/
Process: 13249 ExecStop=/usr/bin/doveadm stop (code=exited, status=0/SUCCESS)
Process: 13391 ExecStart=/usr/sbin/dovecot (code=exited, status=89)
Main PID: 12966 (code=exited, status=0/SUCCESS)
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: Error: socket() failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: Error: service(pop3-login): listen(::, 110) failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: master: Error: socket() failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: Error: socket() failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: Error: service(imap-login): listen(::, 143) failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: master: Error: service(pop3-login): listen(::, 110) failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: master: Error: socket() failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: master: Error: service(imap-login): listen(::, 143) failed: Address family not supported by protocol
Jul 20 09:10:02 s50-63-165-53.secureserver.net dovecot[13391]: Fatal: Failed to start listeners