Receive up to $500 promo credit ($180 w/Welcome Unlimited, $360 w/ 5G Start, or $500 w/5G Do More, 5G Play More, 5G Get More or One Unlimited for iPhone plan (Welcome Unlimited and One Unlimited for iPhone plans can't be mixed w/other Unlimited plans; all lines on the account req'd on respective plans)) when you add a new smartphone line with your own 4G/5G smartphone on an eligible postpaid plan between 12/23/22 and 2/16/23. Promo credit applied over 36 months; promo credits end if eligibility requirements are no longer met. Excludes Verizon Prepaid plans.
Best bet is to use a PC/mac client to pull copy of all emails, and backup from there. If you want the mail to stay on the Verizon servrs, then make sure you change the option (which probably defaults) from delete from server to leave on server.