http error: 400 | {"msg":"Message must be no more than 64k"} while trying to use Iron to send queued emails - development

http error: 400 | {"msg":"Message must be no more than 64k"} while trying to use Iron to send queued emails

I am trying to use Iron in Laravel 5.0 project and we are using Mail::queue() to send our emails but we are getting

http error: 400 | {"msg":"Message must be no more than 64k"} 

this mail works if we directly send it but we are getting this when we are using Mail::queue()

Error stack trace

in IronCore.class.php line 358
at IronCore->reportHttpError('400', '{"msg":"Message must be no more than 64k"}') in IronCore.class.php line 349

Any advise on this will be highly appreciated.

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