We get an exception in the log when receiving mail:

2006-06-05 15:10:04,191 ERROR [service.services.mail.MailFetcherService] Throwable: javax.mail.internet.AddressException: Illegal character in local name in string ``http://vintagerolextoo.infoO_EMAIL''
javax.mail.internet.AddressException: Illegal character in local name in string ``http://vintagerolextoo.infoO_EMAIL''
at javax.mail.internet.InternetAddress.checkAddress(InternetAddress.java:903)
at javax.mail.internet.InternetAddress.parse(InternetAddress.java:793)
at javax.mail.internet.InternetAddress.parseHeader(InternetAddress.java:554)
at javax.mail.internet.MimeMessage.getAddressHeader(MimeMessage.java:658)
at javax.mail.internet.MimeMessage.getRecipients(MimeMessage.java:483)
at javax.mail.Message.getAllRecipients(Message.java:272)
at javax.mail.internet.MimeMessage.getAllRecipients(MimeMessage.java:498)
at com.atlassian.mail.MailUtils.hasRecipient(MailUtils.java:249)
at com.atlassian.jira.service.util.handler.AbstractMessageHandler.canHandleMessage(AbstractMessageHandler.java:172)
at com.atlassian.jira.service.util.handler.CreateOrCommentHandler.handleMessage(CreateOrCommentHandler.java:74)
at com.atlassian.jira.service.services.mail.MailFetcherService.run(MailFetcherService.java:184)
at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:61) at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:48)
at org.quartz.core.JobRunShell.run(JobRunShell.java:191)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516)

This is a spam mail, but it should be avoided however, as we cannot totally block the received mails.