altering "from" field contact form

Hi there!

I have an issue with sending emails. From field looks wierd and different on different hosts:

1. Site name email configured in contact module settings in between less than greater than [email protected]
2. =?UTF-8?B?bunch_of_random_letters_/[email protected]

How and where could i set/alter from field to be like

[email protected]



Any help would be much appreciated

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