Hi Guys, I’ve just moved to a new phone which doesn’t allow me to load the RoundCube mail client (corporate lockdown), so I’m trying to find a way of using Gmail or Outlook (already on the phone) or some other client to access the mail service on Nethserver.
I can access the Nethserver mail server fine through webmail, and I have checked that both IMAP and POP are enabled on the server, but I can’t get either of the clients listed above to log on and handle mail…what is worse, all I get is a cryptic “Can’t log on” message, with no diagnostics.
It should be so simple, but its beaten me! I guess the critical part of the config is port numbers and security. I have tried a whole bunch of port numbers, the usual suspects for IMAP and SMTP, to no avail.
My Nethserver is running in a “domestic” environment and as such is about as default as it can be. I have certificates loaded because I’m running a couple of websites, and I know https works OK, so the certificates must be right (?)
OK, so I checked all the necessary ports are permitted through shorewall (110, 143, 4190, 993, 995, 25, 465, 587) and I can telnet and get a response from 25, 143, 587 and 4190. I get a disconnect from 993, 995 and 465, but that should only affect SSL/TLS, and I should be able to use 25 and 143 (shouldn’t I?) .
However, when I try to set up the client, I still get “cannot log on” messages. Is there a logfile I can access to get more details about why the connections are failing?
looking at what was in the link you sent, it looks like I need port 993 open and responding…can’t use 25 , the doc states “The standard SMTP port 25 is reserved for mail transfers between MTA servers”
But I’m not getting a response when I telnet to 993. Any ideas why that may be…I will continue to investigate/google
Dovecote is running, throwing some errors like this
Nov 07 08:38:26 name_erased.blake-online.net dovecot[2913]: imap-login: Disconnected: Too many invalid commands (no auth attempts in 0 secs): user=<>, rip=118.193.56.149, lip=192.168.xxx.yyy, session=
Nov 07 08:38:26 name_erased.blake-online.net dovecot[2913]: imap-login: Disconnected: Too many invalid commands (no auth attempts in 0 secs): user=<>, rip=118.193.56.149, lip=192.168.xxx.yyy, session=
Nov 07 08:38:27 name_erased.blake-online.net dovecot[2913]: imap-login: Disconnected: Too many invalid commands (no auth attempts in 0 secs): user=<>, rip=118.193.56.149, lip=192.168.xxx.yyy, session=
Yes, on ports TCP: 110, 143, 4190, 993, 995
That didn’t change the issue, I got software disconnects when trying to Telnet into 993 and the mail client failed to connect
I have Fail2ban running on the server, but know very little about it or Threat Shield
Rondcube, which is just another Webmail Service, requires proper configuration and setup as you
know. There is a simpler way to do that is 1 - Import all your old emails using any Email Backup Solution. 2- Set up “Send Mail As,” which is easier to set up. This way, you can dodge the complex part and be sure about the complete data transfer.