Problem in extracting emails via EWS from 11134

Problem in extracting emails via EWS from 11134

Emails getting fetched via EWS are getting failed to process and stops the Mail Fetching when that mail's object doesn't have InternetMessageHeaders.

Note: This issue will not occur for all emails extracted via EWS except for the emails which don't have the expected header in them. (which will be a rare scenario)
The issue started occurring from 11134 due to the fix of SD-84472, in which the content-type mail header is extracted for fixing it.

Issue ID: SD-92222

Exception Error Trace:

[14:49:48:419]|[12-29-2020]|[com.manageengine.servicedesk.mail.core.ProcessEWSMessage]|[SEVERE]|[147]: Exception in getting mailcontent|
[14:49:48:419]|[12-29-2020]|[com.adventnet.servicedesk.helpdesk.mail.task.MailFetchingTask]|[SEVERE]|[147]: Exception : Exception while extracting attachments and inline images|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: com.manageengine.servicedesk.mailutils.MailException: Exception while extracting attachments and inline images|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.manageengine.servicedesk.mail.core.ProcessEWSMessage.loadProperties(ProcessEWSMessage.java:356)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.manageengine.servicedesk.mail.core.ProcessMessageHandler.loadPropertiesIntoBean(ProcessMessageHandler.java:73)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.manageengine.servicedesk.mail.core.ProcessMessageHandler.loadProperties(ProcessMessageHandler.java:45)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.adventnet.servicedesk.mailutils.MailProcessor.processEMail(MailProcessor.java:54)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.adventnet.servicedesk.helpdesk.mail.task.MailFetchingTask.emailThreadOfEWS(MailFetchingTask.java:472)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.adventnet.servicedesk.helpdesk.mail.task.MailFetchingTask.executeTask(MailFetchingTask.java:100)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.adventnet.taskengine.internal.SchedulerBean.executeTask(SchedulerBean.java:634)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.lang.reflect.Method.invoke(Method.java:498)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.adventnet.mfw.bean.BeanProxy.invoke(BeanProxy.java:115)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.sun.proxy.$Proxy5.executeTask(Unknown Source)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.adventnet.taskengine.internal.ScheduleExecutor.executeNextTask(ScheduleExecutor.java:191)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.adventnet.taskengine.internal.ScheduleExecutor.run(ScheduleExecutor.java:86)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.util.concurrent.FutureTask.run(FutureTask.java:266)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at java.lang.Thread.run(Thread.java:748)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: Caused by: java.lang.NullPointerException|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.manageengine.servicedesk.mail.core.ProcessEWSMessage.extractAttachmentsAndInlineImages(ProcessEWSMessage.java:368)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: at com.manageengine.servicedesk.mail.core.ProcessEWSMessage.loadProperties(ProcessEWSMessage.java:352)|
[14:49:48:419]|[12-29-2020]|[SYSERR]|[INFO]|[147]: ... 20 more|


Files Modified :
<SDP>\helpdesk\src\library\com\manageengine\servicedesk\mail\core\ProcessEWSMessage.java

Jar Compatibility :
    11134 , 11135 - SDP Build Version

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