i get this too every time i schedule a blast - email is fine. it's a microsoft exchange email HTTP Status 400 – Bad Request Type Exception Report Message Request header is too large Description The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing). Exception java.lang.IllegalArgumentException: Request header is too large
org.apache.coyote.http11.Http11InputBuffer.fill(Http11InputBuffer.java:770)
org.apache.coyote.http11.Http11InputBuffer.parseHeader(Http11InputBuffer.java:964)
org.apache.coyote.http11.Http11InputBuffer.parseHeaders(Http11InputBuffer.java:591)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:286)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:928)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1794)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:750) Note The full stack trace of the root cause is available in the server logs.
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