If mail is not configured, password reset links will not work and you will have to manually/reset passwords for everyone.
Default configuration is shown below:
## SMTP/Mailer settings smtp['reply_to'] = "reply@packagecloud.io" smtp['from'] = "app@packagecloud.io" smtp['address'] = "my.smtpserver" smtp['domain'] = "packagecloud.io" smtp['enable_starttls_auto'] = true ## Comment out the following lines to disable authentication for SMTP smtp['authentication'] = "plain" smtp['user_name'] = "my username" smtp['password'] = "my password"