MAC Error -17895 Connection to the server failed or was dropped

KarlT
Posts: 7
Joined: Mon Oct 19, 2015 2:25 pm

MAC Error -17895 Connection to the server failed or was dropped

Postby KarlT » Wed Jun 08, 2016 6:16 pm

Hi,

I have a new client that we transfered and is getting an Error 17895 "Connection to the server failed or was dropped" on both his MACs and is using Outlook 2011 (same error on Mac Mail). No matter what we check, he cannot send email through our server. I have other clients with MACs that work fine. It's just that there are 2 of them with the same error message.

Here's my setup and what we've done;
ME Enter. 7.58, Win 2008 R2, valid certificate, ports 993 and 587 both with SSL.
- all users were not able to send at all through our server. We checked, their fixed IP was blacklisted. Had the IP removed from the blacklist
- iPhones (IOS) are now able to send without problems, MACs still getting -17895 error. Added their IP to our whitelist and allowed to relay. Still same error.
- In the ME Systray, I see their IP show up in SMTP IN, but no activity.
- checked Antivirus and Firewall on the MAC, no AV and FW is inactive.
- not listed in any DENY file in config.
- changed Outlook to try port 25, still can't send, changed back to 587.
- changed outgoing server to a backup server we use with less security (used only for web services locally sent), added the IP to allow relay, same error msg.
- restarted SMTP service, same.
- check Google, most of the information leads nowhere.
- ran fix/scan on the Outlook database, no change.
- did a telnet on port 587 and 25, connects.
- a MAC tech checked out the MAC, can't find a problem.

I'm literally at my wit's end. Has anyone had this problem before, or what do I seem to be missing?

Any help would be appreciated.
Thanks,
Karl

MailEnable-Ian
Site Admin
Posts: 8319
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: MAC Error -17895 Connection to the server failed or was dropped

Postby MailEnable-Ian » Thu Jun 09, 2016 12:41 am

Hi,

Are you running an AV email scanners on the server? In particular AVAST?
Regards,

Ian Margarone
MailEnable Support

KarlT
Posts: 7
Joined: Mon Oct 19, 2015 2:25 pm

Re: MAC Error -17895 Connection to the server failed or was dropped

Postby KarlT » Thu Jun 09, 2016 12:03 pm

Hi Ian,

Running BitDefender on both servers we tried. As mentionned, I do have other MACs able to use these servers.

Thanks for your help,
Karl

MailEnable-Ian
Site Admin
Posts: 8319
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: MAC Error -17895 Connection to the server failed or was dropped

Postby MailEnable-Ian » Fri Jun 10, 2016 1:48 am

Hi,

If it works for some and not for others then usually this would point to a client side issue and not server. Try and upgrade to the latest version 7.60 from the link below to ensure you are on the latest. Then perhaps try to configure another email client on the problematic client machine (i.e: Thunderbird) to see if you can connect with that client. Are you able to telnet to the SMTP service from the client machine and issue EHLO commands to see if you get a response?

http://www.mailenable.com/downloadprevious.asp
Regards,

Ian Margarone
MailEnable Support

KarlT
Posts: 7
Joined: Mon Oct 19, 2015 2:25 pm

Re: MAC Error -17895 Connection to the server failed or was dropped

Postby KarlT » Wed Jul 06, 2016 6:07 pm

Hi Ian,

I upgraded 1 server to the latest version. Asked the client to test and is still having the same problem.

I can add a bit more information that I may have omitted in the beginning. In addition to using MailEnable, I also have MXScan for Mailenable installed. But, from what I'm seeing in the logs, the user can't even connect, so I doubt that would be the issue for not connecting.

Any other possible things to look at?

Thanks,
Karl

MailEnable-Ian
Site Admin
Posts: 8319
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: MAC Error -17895 Connection to the server failed or was dropped

Postby MailEnable-Ian » Mon Jul 18, 2016 12:46 am

Hi,

Private message with the mailbox credentials and server details and will setup a mac on my end to see if the same behavior occurs.
Regards,

Ian Margarone
MailEnable Support

KarlT
Posts: 7
Joined: Mon Oct 19, 2015 2:25 pm

Re: MAC Error -17895 Connection to the server failed or was dropped

Postby KarlT » Fri Jul 22, 2016 12:23 pm

I set up a MAC on my side and had the same problems.

I'll create an account for you and PM it to you.

Karl

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