I keep getting a <maito> tag in me email signature that is NOT my email

I keep getting a <maito> tag in me email signature that is NOT my email


My name is Ryan, and for some reason in quite a few cases, I will get a reply back from a client and in my email signature there is a completely different mailto tag in there which is not my email address. This is not only frustrating, but it's causing some confusion and problems with clients. Please advise as to how to fix this.

Thanks



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