Easiest and recommended is to use UA email.
To access UA email, faculty/staff go to UAConnect ; students go to CatMail.
For faculty/staff UA email how-to docs, see UA email and calendar support.
For student UA email how-to-docs, see CatMail support.
All legacy LPL mail accounts have all been migrated, mostly to UA email accounts. LPL forwards will remain in place in perpetuity.