I recently started to receive postmaster and mailerdaemon mails about undelivered mail that have been sent from my corporate domain. It's default spam: attached files/invoices/etc. and it's not coming from my server (we're using a paid email service provider). Most of the emails get rejected as spam as SPF is enabled on the domain, but I'm still worried some people get the mails or see them in the junk filter and associate my company with it.
I initially thought this would be a short attack and things would stop after 24-48 hours, but that has been 3 weeks ago and there are new waves of returned emails all the time which end up in my junk filter.
my SPF record:
v=spf1 include:spf.messagingengine.com ?all
Is there anything I can do?