what is the part of the email after the @ called
Email address An email address such as John.Smith@example.com is made up of a local-part, an @ symbol, then a case-insensitive domain. Although the standard specifies the local part to be case-sensitive, in practice the mail system at example.com may treat John.Smith as equivalent to JohnSmith or even as johnsmith,[1] and mail systems often limit their users' choice of name to a subset of the technically valid characters. In some cases they also limit which addresses it is possible to send mail to.
Last Post The "Last Post" is either a B♭ bugle call within British infantry regiments or an E♭ cavalry trumpet call in British cavalry and Royal Regiment of Artillery (Royal Horse Artillery and Royal Artillery) used at Commonwealth military funerals and ceremonies commemorating those who have been killed in war. Its duration varies typically from a little over one minute to nearly three minutes.[1] For ceremonial use, the Last Post is often followed by "The Rouse", or less usually the longer "Reveille".[2][3]