Can't indent heredoc to match code block's indentation

If there's a "First World Problems" for scripting, this would be it. I have the following code in a script I'm updating: if [ $diffLines -eq 1 ]; then dateLastChanged=$(stat --format '%y' /.bbdata | awk '{print $1" "$2}' | sed 's/\.[0-9]*//g') mailx -r "Systems and Operations " -s "Warning Stale BB Data" jadavis6@[redacted].edu <EOI on a new line and break indentation patterns or 2. Keep with indentation but use something like an echo statement to get mailx to suck up my email. I'm open to alternatives to heredoc, but if there's a way to get around this it's my preferred syntax.