Topic: SMTP error 5.1.1 with some recipient domains
==== Required information ====
- iRedMail version: 0.9.6 MYSQL edition.
- Linux/BSD distribution name and version: Debian Jessie (8)
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? No
- Related log if you're reporting an issue: attached
====
Cannot send to certain domains (.space tld for example)
Error:
An error occurred while sending mail. The mail server responded:
5.1.1 <email@domain.space>: Recipient address rejected: User unknown in virtual mailbox table.
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