- [+] feat(email.go): add formatHeloName function to format HELO identifier and update getHeloName to use it
- [+] feat(email): improve email sending functionality with new HELO name and support for multiple recipients - [+] chore(go.mod): update Go version to 1.23.0 and add go-mail dependency - [+] chore(go.sum): update dependencies and their checksums