Howdy indra_uma, welcome to the Monastery!

Could you please let me know any changes has to be done in the email code

In order to that, we will need to see, at the very least, the code you currently have. Furthermore, can you elaborate on what you mean by "the attachment is either floating or it is seen at the top of the body of the email"? Not having much experience with either OS X or iOS email clients, I can't tell.

A sample (including full headers!) of an email that fails to display properly would be nice as well. My gut feeling is that there's an issue with one of the MIME headers, e.g. Content-Type, Content-Disposition etc. See MIME on Wikipedia for more information on these.

Here's some information on how to ask questions effectively, too:

In reply to Re: Email attachment alignment is not proper in iphone and MAC by AppleFritter
in thread Email attachment alignment is not proper in iphone and MAC by indra_uma

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