Re: [Davmail-users] 2 minute delay when sending mail after network change

[Dan C. <jd...@uw...>]

Should I create an issue about this?  It is completely reproducible for
me.

I should have mentioned that I'm using emacs/Gnus to send mail, using
smtpmail with these settings:

  (setq message-send-mail-function 'smtpmail-send-it)
  (setq smtpmail-smtp-server "localhost")
  (setq smtpmail-smtp-service 1025)
  (setq smtpmail-stream-type `plain)

I don't have another email client set up to test with.  Can anyone else
reproduce this (with Gnus or with another client)?  Would additional
logs help?

Dan

On Jul 30, 2022, Dan Christensen <jd...@uw...> wrote:

> The problem happens if I switch to a different wifi network in my home.
> So I still have the same external IP address, but a different LAN IP
> address (192.168.x.y).
>
> It also happens when I switch from home to work, in which case I of
> course have a different external IP address.
>
> I don't think either situation should affect how I connect to the remote
> O365 server.  I don't use any HTTP proxies, VPNs, etc.
>
> Note that the log shows that after the network change, davmail is still
> able to talk to the server: the EHLO gets a response.  It's the
> authentication step that seems to block.
>
> If it would help, I can send more logs, e.g. for a fast connection when
> the network hasn't changed.
>
> Dan
>
> On Jul 30, 2022, Mickaël Guessant <mgu...@fr...> wrote:
>
>> When you say switch wifi network, do you mean your network location
>> IP address, ... also changes ?
>>
>> I had issues a long time ago with company Exchange that had a
>> different IP between external and internal facing frontend => had to
>> wait for DNS
>> resolution to expire.
>>
>> However you seem to access O365 so shouldn't be an issue.
>>
>> The 2 minute delay suggest that cached connections in DavMail fail
>> after you switch, and we have an background thread to close idle
>> connections.
>>
>> Another question: do you have HTTP proxies on one side ?
>>
>> Regards,
>>
>>
>> On 28/07/2022 22:38, Dan Christensen wrote:
>>> I can reproduce the issue with davmail_5.5.1-3299-1_all.deb available
>>> at https://sourceforge.net/projects/davmail/files/davmail/5.5.1/ ,
>>> so the upgrade to davmail doesn't explain the change.  Not sure what
>>> else to suggest.
>>>
>>> Dan
>>>
>>> On Jul 28, 2022, Dan Christensen <jd...@uw...> wrote:
>>>
>>>> If I send an email message through davmail, then switch wifi networks,
>>>> and then try to send a second message, there is a delay of two minutes.
>>>> I have included a debug log below, from the start of the second
>>>> connection until just after the 2 minute delay.  (The last two
>>>> timestamps differ by 2 minutes.)  I've used davmail for over a year, but
>>>> this only started happening recently.  It's possible it started when I
>>>> upgraded my system from Ubuntu 21.10 to 22.04, which upgraded davmail
>>>> from 5.5.1.3299-5 to 6.0.1.3390-1.  I see that there were O365 changes
>>>> there, so maybe they are related?
>>>>
>>>> I have also included my .davmail.properties (minus the refresh token).
>>>>
>>>> Any advice?
>>>>
>>>> Thanks,
>>>>
>>>> Dan
>>>>
>>>> 2022-07-28 16:04:39,795 DEBUG [davmail.smtp.SmtpServer] davmail -
>>>> Connection from /127.0.0.1 on port 1025
>>>> 2022-07-28 16:04:39,795 INFO [davmail.smtp.SmtpServer]
>>>> davmail.connection - CONNECT - 127.0.0.1:53760
>>>> 2022-07-28 16:04:39,873 DEBUG [SmtpConnection-53760]
>>>> davmail.http.DavGatewaySSLSocketFactory - createSocket
>>>> outlook.office365.com 443
>>>> 2022-07-28 16:04:40,207 DEBUG [SmtpConnection-53760]
>>>> davmail.exchange.ExchangeSession - Test configuration status: 401
>>>> 2022-07-28 16:04:40,208 DEBUG [SmtpConnection-53760] davmail - >
>>>> 220 DavMail 6.0.1-trunk SMTP ready at Thu Jul 28 16:04:40 EDT 2022
>>>> 2022-07-28 16:04:40,208 DEBUG [SmtpConnection-53760] davmail  - < EHLO snowy
>>>> 2022-07-28 16:04:40,208 DEBUG [SmtpConnection-53760] davmail  - > 250-snowy
>>>> 2022-07-28 16:04:40,208 DEBUG [SmtpConnection-53760] davmail  - > 250-AUTH LOGIN PLAIN
>>>> 2022-07-28 16:04:40,209 DEBUG [SmtpConnection-53760] davmail  - > 250-8BITMIME
>>>> 2022-07-28 16:04:40,209 DEBUG [SmtpConnection-53760] davmail  - > 250 Hello
>>>> 2022-07-28 16:04:40,209 DEBUG [SmtpConnection-53760] davmail  - < AUTH PLAIN ********
>>>> 2022-07-28 16:04:40,209 DEBUG [SmtpConnection-53760]
>>>> davmail.exchange.ExchangeSession - Got session
>>>> davmail.exchange.ews.EwsExchangeSession@50e0b9aa from cache
>>>> 2022-07-28 16:06:40,234 DEBUG [SmtpConnection-53760]
>>>> davmail.exchange.ExchangeSession - Session
>>>> davmail.exchange.ews.EwsExchangeSession@50e0b9aa for user
>>>> jd...@uw... expired
>>>>
>>>>
>>>> davmail.ssl.keystoreType=
>>>> davmail.ssl.keystorePass=
>>>> davmail.proxyPassword=
>>>> davmail.oauth.tenantId=
>>>> davmail.oauth.clientId=
>>>> davmail.smtpPort=1025
>>>> davmail.enableKerberos=false
>>>> davmail.folderSizeLimit=
>>>> davmail.forceActiveSyncUpdate=false
>>>> davmail.imapAutoExpunge=false
>>>> davmail.useSystemProxies=false
>>>> davmail.proxyUser=
>>>> davmail.caldavEditNotifications=false
>>>> davmail.ssl.nosecuresmtp=false
>>>> davmail.caldavPastDelay=0
>>>> davmail.ssl.keyPass=
>>>> log4j.logger.httpclient.wire=WARN
>>>> davmail.noProxyFor=
>>>> davmail.server=true
>>>> log4j.logger.org.apache.commons.httpclient=WARN
>>>> davmail.popMarkReadOnRetr=false
>>>> davmail.ssl.nosecureimap=false
>>>> davmail.disableTrayActivitySwitch=false
>>>> davmail.caldavAutoSchedule=true
>>>> davmail.enableProxy=false
>>>> davmail.proxyPort=
>>>> davmail.logFileSize=10MB
>>>> davmail.mode=O365Manual
>>>> davmail.smtpSaveInSent=false
>>>> davmail.bindAddress=
>>>> davmail.ssl.nosecurepop=false
>>>> davmail.ssl.pkcs11Library=
>>>> log4j.rootLogger=WARN
>>>> davmail.ssl.keystoreFile=
>>>> log4j.logger.davmail=DEBUG
>>>> #log4j.logger.davmail=INFO
>>>> davmail.ssl.clientKeystoreType=
>>>> davmail.clientSoTimeout=
>>>> davmail.ssl.pkcs11Config=
>>>> davmail.imapPort=
>>>> davmail.ssl.clientKeystorePass=
>>>> davmail.url=https://outlook.office365.com/EWS/Exchange.asmx
>>>> davmail.sentKeepDelay=0
>>>> davmail.ssl.nosecureldap=false
>>>> davmail.imapAlwaysApproxMsgSize=false
>>>> davmail.ssl.nosecurecaldav=false
>>>> davmail.popPort=
>>>> davmail.defaultDomain=
>>>> davmail.showStartupBanner=false
>>>> davmail.proxyHost=
>>>> davmail.oauth.persistToken=true
>>>> davmail.ldapPort=
>>>> davmail.server.certificate.hash=
>>>> log4j.logger.org.apache.http.wire=WARN
>>>> davmail.disableGuiNotifications=false
>>>> davmail.imapIdleDelay=
>>>> davmail.allowRemote=false
>>>> davmail.disableUpdateCheck=false
>>>> log4j.logger.org.apache.http=WARN
>>>> davmail.caldavPort=
>>>> davmail.enableKeepAlive=true
>>>> davmail.ssl.clientKeystoreFile=
>>>> davmail.logFilePath=/scratch/davmail.log
>>>> davmail.carddavReadPhoto=true
>>>> davmail.keepDelay=30
>>>> davmail.oauth.redirectUri=
>>>> davmail.caldavAlarmSound=
>>>
>>>
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