Respected Sir/Madam,
I am writing this email to inform you that I have applied for a job at _______ (company name) and as per the company requirement, a recommendation letter is required for processing of my job application. It would be really appreciated if you could provide me with a recommendation letter regarding the same.
I hope that you will consider my request and issue me with a recommendation letter at the earliest. In case you wish to contact me, you can contact me at ____________ (contact details).
Yours Truly,
____________ (Name),
____________ (Designation),
____________ (Contact details)