When we try to send an email from a smartphone, this message appears in the sync.log :
2015-07-28 14:14:07,782 ERROR [ZxMobile] [tid=48768;account=user@domain.com;id=android11;model=googleNexus4;oip=X.X.X.X;eas=14.1;rid=1173;] sync - Unable to send email: com.zimbra.common.service.ServiceException: system failure: Unable to send message
ExceptionId:ZxMobile:1438085647781:be85440e41a0d174
Code:service.FAILURE: org.openzal.zal.exceptions.ZimbraException: com.zimbra.common.service.ServiceException: system failure: Unable to send message
ExceptionId:ZxMobile:1438085647781:be85440e41a0d174
Code:service.FAILURE
at org.openzal.zal.exceptions.ExceptionWrapper$31.create ( ExceptionWrapper.java:304 )
at org.openzal.zal.exceptions.ExceptionWrapper.wrap ( ExceptionWrapper.java:352 )
...
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run ( QueuedThreadPool.java:538 )
at java.lang.Thread.run ( Thread.java:722 )
Caused by: com.zimbra.common.service.ServiceException: system failure: Unable to send message
ExceptionId:ZxMobile:1438085647781:be85440e41a0d174
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE ( ServiceException.java:258 )
at com.zimbra.cs.mailbox.MailSender.sendMimeMessage ( MailSender.java:691 )
...
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run ( QueuedThreadPool.java:538 )
at java.lang.Thread.run ( Thread.java:722 )
Caused by: javax.mail.internet.AddressException: Local address contains control or whitespace in string ``User Name''
at javax.mail.internet.InternetAddress.checkAddress ( InternetAddress.java:1213 )
at javax.mail.internet.InternetAddress.parse ( InternetAddress.java:1091 )
at javax.mail.internet.InternetAddress.parseHeader ( InternetAddress.java:658 )
at javax.mail.internet.MimeMessage.getAddressHeader ( MimeMessage.java:702 )
We've found that by removing the blank space in the "from" field, the sending works. Not a valid solution because we have many users ... :confused: