|This is the last time your account was accessed.|
Per Allen1 and Herd1 the solution below does work ...
on the iphone 8, my friend's verizon email started to do/have the same trouble, giving an error message when sending email (sorry I don't have the exact error any more).
In the settings for the verizon account, scroll down to the Outgoing Mail Server, click to open SMTP, remove the Primary Server (which probably says verizon.net), below you should see the smtp.aol.com option, click it, enable it, use the @verizon.net for the username and use port 465. WHEW!!!! Shame on Verizon and/or AOL for not sharing this info with folks. But, a lot of us know ... it is likely a way to get everyone to change to IMAP (which I bet they'd prefer).