web mail will keeps getting rejected

    host mx2c12.mtsbiz.net [69.49.101.249]

    SMTP error from remote mail server after MAIL FROM:<SRS0=u8Wup2=E3=dabsrepair.com=office@eigbox.net>:

    550 5.7.1 H:DYNB [66.96.184.2] Connection refused due to abuse. Please contact your E-mail provider.

I am getting this error: 

The sender must authenticate with at least one of SPF or DKIM

Is that something homestead does or I do?  If I need to do it, how do I?

OK, thank you. Is that the full text or just copied part of it?

starting to get this more now too.

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

  tmarshall@harvestmanitoba.ca

    host harvestmanitoba-ca.mail.protection.outlook.com [104.47.75.164]

    SMTP error from remote mail server after pipelined sending data block:

    451 4.7.500 Server busy. Please try again later from [66.96.184.4]. (S77719) [YT3CAN01FT006.eop-CAN01.prod.protection.outlook.com 2023-09-07T22:13:50.968Z 08DBAF7B3925D59E]:

    retry timeout exceeded

  invoices@harvestmanitoba.ca

    host harvestmanitoba-ca.mail.protection.outlook.com [104.47.75.164]

    SMTP error from remote mail server after pipelined sending data block:

    451 4.7.500 Server busy. Please try again later from [66.96.184.4]. (S77719) [YT3CAN01FT006.eop-CAN01.prod.protection.outlook.com 2023-09-07T22:13:50.968Z 08DBAF7B3925D59E]:

    retry timeout exceeded

OK, thank you. I've reported this bounceback.