Expand primary e-mail length

For our Contact Center / Voicemail notification solution we need to configure a Salesforce generated e-mail address in Control Hub to forward the e-mail to. The control Hub Field for primary e-mail is limited. We need approximately 120 Characters. Workaround is to create shared mail accounts attached to a single user, but having 40+ shared accounts configured primarily to forward the Voicemails is not efficient at all.