==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (0.9.9):
- Deployed with iRedMail downloadable installer
- Linux/BSD distribution name and version:  Ubuntu 16.04.1 LTS
- Store mail accounts in which backend (MySQL):
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? NO
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hello,

First, I apologize for my not so good English.

Now to my problem, I tried to install iRedMail on my freshly installed server and followed the instructions "https://docs.iredmail.org/install.iredm … buntu.html". After a short time, however, I get the following error message:

E: Unable to locate package sogo-activesync
E: Unable to locate package sope4.9-gdl1-mysql
E: Could not find any package by glob 'sope4.9-gdl1-mysql'
E: Could not find any package by regex 'sope4.9-gdl1-mysql'
<< ERROR >> Installation failed, please check the terminal output.
<< ERROR >> If you're not sure what the problem is, try to get help in iRedMail
<< ERROR >> forum: https://forum.iredmail.org/

I hope someone can help me here.

Thank you in advance, your Sorgonas

OK,

I have tried again, and have previously run the apt-get update && apt-get upgrade.

After that, unfortunately, I still have errors, but these are the others:

Errors were encountered while processing:
  fail2ban
  nginx-full
E: Sub-process / usr / bin / dpkg returned to error code (1)
<< ERROR >> Installation failed, please check the terminal output.
<< ERROR >> If you're not sure what the problem is, try to get help in iRedMail
<< ERROR >> forum: https://forum.iredmail.org/

do I have to install fail2ban and nginx before?