Messages to myldsmail.net getting routed to spam

[xebikr]

I run a mail domain for my family, ethingtonfamily.net, that is hosted by a friend through his domain (cytherean.org). Recently, my dad, who is serving a mission in Chicago, had his email account compromised and it was used by a spammer to send bulk email. The intrusion was not long lived, but it did a lot of damage to the domain's ability to send email. I was happy to see that emails to myldsmail.net were not rejected, but my wife just found out that all the emails she has sent to our missionary daughter have been forwarded to the spam folder.

Is there anything we can do to reverse this?

Thanks.

[scgallafent]

I'm not on the email team, so this isn't an official answer.

You need to start by addressing email reputation problems. Your friend's mail server is still listed on two blacklists.

[xebikr]

Thanks for the reply. Can you give me the names of the blacklists? I checked 5 of them that I found on google, but none of them had the domain or ip address listed as blocked.

[scgallafent]

See https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a+%0952.206.6.134&run=toolpage.