#312 Davmail can't reach Webmail from inside secured network

[Frederic Cyr]

Hi,
Davmail used to work fine inside my job network, but recent changes (whether to network or computer updates) now prevent Davmail from connecting to my Webmail. The interesting thing is that it still works fine from outside the secured network. I would need help to diagnose the problem which looks related to SSL:

Date: Mon Aug 14 14:50:18 NDT 2017 (1502731218991)
Thread: ImapConnection-44800
Message #: 3
Level: ERROR
NDC:
Category: davmail
Message: DavMail configuration exception:
Connect exception: javax.net.ssl.SSLException Received fatal alert: protocol_version
Location: davmail.ui.tray.DavGatewayTray.displayMessage(DavGatewayTray.java:113)
Thrown:
davmail.exception.DavMailException: DavMail configuration exception:
Connect exception: javax.net.ssl.SSLException Received fatal alert: protocol_version
at davmail.exchange.ExchangeSessionFactory.handleNetworkDown(ExchangeSessionFactory.java:266)
at davmail.exchange.ExchangeSessionFactory.checkConfig(ExchangeSessionFactory.java:241)
at davmail.imap.ImapConnection.run(ImapConnection.java:81)

[Mickael Guessant]

Indeed, protocol mismatch between DavMail and Exchange ?

Please run DavMail with -Djavax.net.debug=all to get more details on SSL/TLS negotiation.

Maybe Exchange server only accepts SSLv3, which is no longer considered secure ?

[Frederic Cyr]

Hi, thanks for the reply.

I finally managed to find a workaround. When inside the secure network, I
must change the URL to the real server name instead of using the
"redirecting" address https\://webmail.*owa/
A bit annoying to toggle between two addresses, but that solved the problem.

Thanks,

Fred

On 5 September 2017 at 19:30, Mickael Guessant mguessan@users.sf.net
wrote:

Indeed, protocol mismatch between DavMail and Exchange ?

Please run DavMail with -Djavax.net.debug=all to get more details on
SSL/TLS negotiation.

Maybe Exchange server only accepts SSLv3, which is no longer considered
secure ?

---

• [support-requests:#312]
  https://sourceforge.net/p/davmail/support-requests/312/ Davmail can't
  reach Webmail from inside secured network*

Status: open
Group: v4.7.3
Created: Mon Aug 14, 2017 06:13 PM UTC by Frederic Cyr
Last Updated: Mon Aug 14, 2017 06:13 PM UTC
Owner: nobody

Hi,
Davmail used to work fine inside my job network, but recent changes
(whether to network or computer updates) now prevent Davmail from
connecting to my Webmail. The interesting thing is that it still works fine
from outside the secured network. I would need help to diagnose the problem
which looks related to SSL:

Date: Mon Aug 14 14:50:18 NDT 2017 (1502731218991)
Thread: ImapConnection-44800
Message #: 3
Level: ERROR
NDC:
Category: davmail
Message: DavMail configuration exception:
Connect exception: javax.net.ssl.SSLException Received fatal alert:
protocol_version
Location: davmail.ui.tray.DavGatewayTray.displayMessage(
DavGatewayTray.java:113)
Thrown:
davmail.exception.DavMailException: DavMail configuration exception:
Connect exception: javax.net.ssl.SSLException Received fatal alert:
protocol_version
at davmail.exchange.ExchangeSessionFactory.handleNetworkDown(
ExchangeSessionFactory.java:266)
at davmail.exchange.ExchangeSessionFactory.checkConfig(
ExchangeSessionFactory.java:241)
at davmail.imap.ImapConnection.run(ImapConnection.java:81)

---

Sent from sourceforge.net because you indicated interest in
https://sourceforge.net/p/davmail/support-requests/312/

To unsubscribe from further messages, please visit
https://sourceforge.net/auth/subscriptions/

[Mickael Guessant]

Thanks for your feedback... At some point we should probably try to implement multiple endpoints support.

[Frederic Cyr]

Hi,

There is an update. It now works also from the secured network, but I
have to change the URL to the "real server" name, not the webmail
address that is only a re-direction. Although webmail still works from
outside, I need to switch to the other URL when at work.

Hope this description helps, but for now I don't need support anymore.

Thanks for maintaining this package!

Fred

On 15/10/17 06:51 PM, Mickael Guessant wrote:

Thanks for your feedback... At some point we should probably try to
implement multiple endpoints support.

---

[support-requests:#312]
https://sourceforge.net/p/davmail/support-requests/312/ Davmail
can't reach Webmail from inside secured network

Status: open
Group: v4.7.3
Created: Mon Aug 14, 2017 06:13 PM UTC by Frederic Cyr
Last Updated: Tue Sep 05, 2017 10:00 PM UTC
Owner: nobody

Hi,
Davmail used to work fine inside my job network, but recent changes
(whether to network or computer updates) now prevent Davmail from
connecting to my Webmail. The interesting thing is that it still works
fine from outside the secured network. I would need help to diagnose
the problem which looks related to SSL:

Date: Mon Aug 14 14:50:18 NDT 2017 (1502731218991)
Thread: ImapConnection-44800
Message #: 3
Level: ERROR
NDC:
Category: davmail
Message: DavMail configuration exception:
Connect exception: javax.net.ssl.SSLException Received fatal alert:
protocol_version
Location:
davmail.ui.tray.DavGatewayTray.displayMessage(DavGatewayTray.java:113)
Thrown:
davmail.exception.DavMailException: DavMail configuration exception:
Connect exception: javax.net.ssl.SSLException Received fatal alert:
protocol_version
at
davmail.exchange.ExchangeSessionFactory.handleNetworkDown(ExchangeSessionFactory.java:266)
at
davmail.exchange.ExchangeSessionFactory.checkConfig(ExchangeSessionFactory.java:241)
at davmail.imap.ImapConnection.run(ImapConnection.java:81)

---

Sent from sourceforge.net because you indicated interest in
https://sourceforge.net/p/davmail/support-requests/312/

To unsubscribe from further messages, please visit
https://sourceforge.net/auth/subscriptions/