mirror of
https://github.com/tomav/docker-mailserver.git
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52 lines
2.1 KiB
Markdown
52 lines
2.1 KiB
Markdown
..todo.. - Please contribute more to help others debug this package
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## Invalid username or Password
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1. Login Container
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```bash
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docker exec -it <mycontainer> bash
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```
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2. Check log files
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`/var/log/mail`
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could not find any mention of incorrect logins here
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neither in the dovecot logs
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3. Make sure you set your hostname to 'mail' or whatever you specified in your docker-compose.yml file or else your FQDN will be wrong
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## Installation Errors
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1. During setup, if you get errors trying to edit files inside of the container, you likely need to install vi:
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``` bash
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sudo su
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docker exec -it <mycontainer> apt-get install -y vim
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```
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## Testing Connection
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I spent HOURS trying to debug "Connection Refused" and "Connection closed by foreign host" errors when trying to use telnet to troubleshoot my connection. I was also trying to connect from my email client (macOS mail) around the same time. Telnet had also worked earlier, so I was extremely confused as to why it suddenly stopped working. I stumbled upon fail2ban.log in my container. In short, when trying to get my macOS client working, I exceeded the number of failed login attempts and fail2ban put dovecot and postfix in jail! I got around it by whitelisting my ipaddresses (my ec2 instance and my local computer)
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```bash
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sudo su
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docker exec -ti mail bash
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cd /var/log
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cat fail2ban.log | grep dovecot
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# Whitelist ip addresses:
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fail2ban-client set dovecot addignoreip <server ip> # ec2 cloud server
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fail2ban-client set postfix addignoreip <server ip>
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fail2ban-client set dovecot addignoreip <client ip> # my desktop
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fail2ban-client set postfix addignoreip <client ip>
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# this will delete the jails entirely - nuclear option
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fail2ban-client stop dovecot
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fail2ban-client stop postfix
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```
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## No Mail?
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I finally got my macOS client working, but was not receiving test messages. I edited docker-compose.yml and temporarily disabled the spam filter (and fail2ban). Now I am getting mail. I will troubleshoot those and re-enable them next week, but thought this might be of help for others trying to troubleshoot.
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```bash
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environment:
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- ENABLE_MANAGESIEVE=0
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- ENABLE_FAIL2BAN=0
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``` |