A: hey there! honest answer — not yet for campaigns and sequences. right now those go out through utobo’s own servers, so you can’t route them through Sendgrid, Mailjet or ElasticMail. the only place your own SMTP plugs in today is as a connected mail account (replies from Unibox + warmup). sending campaigns through your own provider is something we’re working on and should be available in about a month.