Is leaving a reference email enough, my boss prefers I give my new job his email not his phone number?

Sirbestat
I am looking for a new job, my current employer that I have worked for two years knows, wrote me a good letter of recommendation. However, I asked if it was okay to add him as a reference when the new job asks for references, and he said he would be happy to but to not give them his number, give him his email. He does check his emails daily and it's hard to get a hold of him by the phone. Is it okay to just give a references email not there number?
email is okay
You can only give reference by number
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Is leaving a reference email enough, my boss prefers I give my new job his email not his phone number?
5 Opinion