riemann email exception with SMTP

Question

I was able to set up riemann with SMTP. Riemann appears to send the email out when the condition is met but I observe an exception (copied below) - any insight on how to troubleshoot/fix this will be appreciated.

Config

    (def email (mailer {:host "xxx.xxx.xxx.xxx"
                        :port "xxxx"
                        :user "[email protected]"
                        :pass "user12345"
                        :from "[email protected]"}))

(streams
 (where (and (service #"^riemann netty execution-handler"))
        (email "[email protected]")))

Error:

#riemann.codec.Event{:host "ubuntu-3", :service "riemann netty execution-handler threads active", :state "ok", :description nil, :metric 0, :tags nil, :time 348380111059/250, :ttl 20000}
WARN [2014-02-27 12:00:44,278] Thread-10 - riemann.config - riemann.email$mailer$make_stream__16773$stream__16774@4e9c33e9 threw
java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Number
        at postal.smtp$smtp_send_STAR_.invoke(smtp.clj:33)
        at postal.smtp$smtp_send.doInvoke(smtp.clj:58)
        at clojure.lang.RestFn.invoke(RestFn.java:423)
        at postal.core$send_message.invoke(core.clj:35)
        at riemann.email$email_event.invoke(email.clj:18)
        at riemann.email$mailer$make_stream__16773$stream__16774.invoke(email.clj:69)
        at riemann.config$eval40$stream__41$fn__46.invoke(riemann.config:44)
        at riemann.config$eval40$stream__41.invoke(riemann.config:44)
        at riemann.core$stream_BANG_$fn__10513.invoke(core.clj:19)
        at riemann.core$stream_BANG_.invoke(core.clj:18)
        at riemann.core$instrumentation_service$measure__10522.invoke(core.clj:56)
        at riemann.service.ThreadService$thread_service_runner__8329$fn__8330.invoke(service.clj:64)
        at riemann.service.ThreadService$thread_service_runner__8329.invoke(service.clj:63)
        at clojure.lang.AFn.run(AFn.java:24)
        at java.lang.Thread.run(Thread.java:744)

Answer 1

The issue was resolved by specifying the port number as a number (without the inverted commas).

Config

 (def email (mailer {:host "xxx.xxx.xxx.xxx"
                        :port xxxx
                        :user "[email protected]"
                        :pass "user12345"
                        :from "[email protected]"}))

(streams
 (where (and (service #"^riemann netty execution-handler"))
        (email "[email protected]")))