Issue was not fixed in Issue 3152. Provided there patches have no effect on it.
Every third reply has different ConversationID.
Below the output for working and not working headers.
Multiple lines(breaking thread):
ConversationId of each mail contains BASE64 text of exact References list.
Single lines(working thread):
And it has some empty EAS command.
ConversationId of each email contains BASE64 text of only the first emails mail-id.
Example debug:
Working:
<To xmlns="Email:">"Alexander Magliovany" <secondemail@youritcrowd.com></To>
<From xmlns="Email:">"Alexander Kalashnikov" <firstemail@yandex.ru></From>
<Subject xmlns="Email:">Re: 1111</Subject>
<ThreadTopic xmlns="Email:">1111</ThreadTopic>
<DateReceived xmlns="Email:">2016-03-10T08:48:04.000Z</DateReceived>
<ConversationId xmlns="Email2:">PDIwMTYwMzEwMDg0MzE0LjUxMjQxNzYuOTg0NTEuODM3QHlhbmRleC5ydT4=</ConversationId>
<To xmlns="Email:">"Alexander Kalashnikov" <firstemail@yandex.ru></To>
<From xmlns="Email:">"Alexander Magliovany" <secondemail@youritcrowd.com></From>
<Subject xmlns="Email:">Re: 1111</Subject>
<ThreadTopic xmlns="Email:">1111</ThreadTopic>
<DateReceived xmlns="Email:">2016-03-10T08:45:41.000Z</DateReceived>
<ConversationId xmlns="Email2:">PDIwMTYwMzEwMDg0MzE0LjUxMjQxNzYuOTg0NTEuODM3QHlhbmRleC5ydT4=</ConversationId>
<To xmlns="Email:">"Alexander Magliovany" <secondemail@youritcrowd.com></To>
<From xmlns="Email:">"Alexander Kalashnikov" <firstemail@yandex.ru></From>
<Subject xmlns="Email:">Re: 1111</Subject>
<ThreadTopic xmlns="Email:">1111</ThreadTopic>
<DateReceived xmlns="Email:">2016-03-10T08:48:04.000Z</DateReceived>
<DisplayTo xmlns="Email:">alex.m</DisplayTo>
<Importance xmlns="Email:">1</Importance>
<Read xmlns="Email:">1</Read>
<MessageClass xmlns="Email:">IPM.Note</MessageClass>
<ContentClass xmlns="Email:">urn:content-classes:message</ContentClass>
<InternetCPID xmlns="Email:">65001</InternetCPID>
<Body xmlns="AirSyncBase:">
<Type>2</Type>
<Truncated>0</Truncated>
<Preview/>
<Data/>
<EstimatedDataSize>0</EstimatedDataSize>
</Body>
<Flag xmlns="Email:">
<FlagStatus>0</FlagStatus>
</Flag>
<Categories xmlns="Email:"/>
<ConversationId xmlns="Email2:">PDIwMTYwMzEwMDg0MzE0LjUxMjQxNzYuOTg0NTEuODM3QHlhbmRleC5ydT4=</ConversationId>
<NativeBodyType xmlns="AirSyncBase:">2</NativeBodyType>
<To xmlns="Email:">"Alexander Magliovany" <secondemail@youritcrowd.com></To>
<From xmlns="Email:">"Alexander Kalashnikov" <firstemail@yandex.ru></From>
<Subject xmlns="Email:">1111</Subject>
<ThreadTopic xmlns="Email:">1111</ThreadTopic>
<DateReceived xmlns="Email:">2016-03-10T08:43:14.000Z</DateReceived>
<ConversationId xmlns="Email2:">PDIwMTYwMzEwMDg0MzE0LjUxMjQxNzYuOTg0NTEuODM3QHlhbmRleC5ydT4=</ConversationId>
Not Working:
<To xmlns="Email:">"Alexander Magliovany" <secondemail@youritcrowd.com></To>
<From xmlns="Email:">"Alexander Kalashnikov" <firstemail@yandex.ru></From>
<Subject xmlns="Email:">Re: 1111</Subject>
<ThreadTopic xmlns="Email:">1111</ThreadTopic>
<DateReceived xmlns="Email:">2016-03-10T08:48:04.000Z</DateReceived>
<ConversationId xmlns="Email2:">PDIwMTYwMzEwMDg0MzE0LjUxMjQxNzYuOTg0NTEuODM3QHlhbmRleC5ydT48MjAxNjAzMTAwODQ1NDEuNTEyNDE3Ni4xOTk
1OC4xNTUxQHlvdXJpdGNyb3dkLmNvbT4=</ConversationId>
<To xmlns="Email:">"Alexander Kalashnikov" <firstemail@yandex.ru></To>
<From xmlns="Email:">"Alexander Magliovany" <secondemail@youritcrowd.com></From>
<Subject xmlns="Email:">Re: 1111</Subject>
<ThreadTopic xmlns="Email:">1111</ThreadTopic>
<DateReceived xmlns="Email:">2016-03-10T08:45:41.000Z</DateReceived>
<ConversationId xmlns="Email2:">PDIwMTYwMzEwMDg0MzE0LjUxMjQxNzYuOTg0NTEuODM3QHlhbmRleC5ydT4=</ConversationId>
<To xmlns="Email:">"Alexander Magliovany" <secondemail@youritcrowd.com></To>
<From xmlns="Email:">"Alexander Kalashnikov" <firstemail@yandex.ru></From>
<Subject xmlns="Email:">1111</Subject>
<ThreadTopic xmlns="Email:">1111</ThreadTopic>
<DateReceived xmlns="Email:">2016-03-10T08:43:14.000Z</DateReceived>
<ConversationId xmlns="Email2:">PDIwMTYwMzEwMDg0MzE0LjUxMjQxNzYuOTg0NTEuODM3QHlhbmRleC5ydT4=</ConversationId> | 
