I'm cleaning up my database and I'm going through my bounces. I have about 1800+ leads on this leads which a variety of email invalid causes. The biggest chunk of which is are labeled:
Do you recommend that we delete these or does it warrant further investigation?
Also, are the invalid causes that are automatic deletes for you? Thank you!
In any case, I recommend that you never fire automatic delete, because there is no undo in Marketo and if you make an error there, it's irremediable.
Usually, we recommend that you scroll over these hard bounces with a few criteria in mind:
Hard bounces that are customers, or quite engaged with you, or simply core targets are worth a re-qualification from the telesales or telemarketing, to identify a replacement. Hard bounces that happened on first emails might be simple spelling errors and often can be fixed easily.