One general question: I have a server on a shared host which IP constantly gets on blacklists of some mailservers (live.com, hotmail, ...).
That means we can receive emails but cannot send emails to those providers.
Months of unblacklisting, communication with the provider does not seem to be a durable solution.
I've found one solution that seems to be pragmatic and working: We simply change the smtp relay in the mail clients to another provider (e.g. Mailjet) and add SPF / DKIM TXT records to the main domain.
So far everything seems to be fine, the emails get delivered (because the mails are sent from another IP). Are there some caveats to that approach or is this common practice?