# Troubleshooting Email Errors ## ERROR listmailuser: '/tmp/docker-mailserver/postfix-accounts.cf' does not exist Dovecot is not started until the first email account is created, therefor listing email accounts with the command `opencli email-setup email list` before creating any email accounts, will produce error: ```bash root@stefi:/usr/local/mail/openmail# opencli email-setup email list 2024-08-27 07:55:15+00:00 ERROR listmailuser: '/tmp/docker-mailserver/postfix-accounts.cf' does not exist 2024-08-27 07:55:15+00:00 ERROR listmailuser: Aborting ``` **Solution**: Create an email account first with [opencli email-setup email add](https://dev.openpanel.com/cli/email.html#Create-email). ---- ## Error: auth-master: userdb lookup(user@example.net): connect(/run/dovecot/auth-userdb) failed: No such file or directory Immediately after creating first email account, dovecot is still creating necessary files in the background, so running the `opencli email-setup email list` immediately after creating first email account will produce an error: ``` root@stefi:/usr/local/mail/openmail# opencli email-setup email list doveadm(stefan@stefi.openpanel.site)<577><>: Error: auth-master: userdb lookup(stefan@stefi.openpanel.site): connect(/run/dovecot/auth-userdb) failed: No such file or directory doveadm(stefan@stefi.openpanel.site): Error: User lookup failed: Internal error occurred. Refer to server log for more information. 2024-08-27 07:55:46+00:00 ERROR listmailuser: Supplied non-number argument '' to '_bytes_to_human_readable_size()' 2024-08-27 07:55:46+00:00 ERROR listmailuser: Aborting 2024-08-27 07:55:46+00:00 ERROR listmailuser: Supplied non-number argument '' to '_bytes_to_human_readable_size()' 2024-08-27 07:55:46+00:00 ERROR listmailuser: Aborting * stefan@stefi.openpanel.site ( / ) [%] ``` **Solution**: Repeat the command `opencli email-setup email list` ----