openssl s_client -starttls smtp -crlf -connect smtp.gmail.com:587 EHLO localhost AUTH LOGIN #ユーザーID(メールアドレス)をBase64 xxxxxxxxxxxxxxxxxxxxxxxxxx= #パスワードをBase64 xxxxxxxxxxxxxxxxxxxx= mail from:rcpt to: data From: ; To: ; hogepiyo .
■文字列のbase64化
echo "hogehoge" | openssl enc -e -base64