Having just installed nethserver, i find that the letsencrypt certificates work well. Nethserver can send emails to gmail and such like successfully.
however, no emails are being received by nethserver from any source, senders are being given a failed to deliver email stating that the nethserver doesnt accept 550 relays - “550 relay not permitted”. presumably “550” refers to a port or socket number on the nethserver?
yes ive read the docs and cant find any guidance.
does anyone know how to get the nethserver to accept these relays and if doing so would then allow other services to send their email to my users on this nethserver?
many thanks for your time and patince