CiviCRM does not send mail to microsoft based webmail clients (outlook, hotmail and live)
CiviCRM Version 4.7.4 on Wordpress
ECDHE-RSA-AES256-SHA384:256 CV=yes: SMTP error from remote mail server after MAIL FROM: email address redacted SIZE=1620: 550 SC-001 (BAY004-MC1F36)
This has been happening consistently over time, is there any way to track or identify where the process is falling down?
We have tested thirdsectordumgal (via Civi) to live, which failed. live (via civi) to thirdsectordumgal appeared to work, but has not shown up. live (via civi) to live also failed.
We use Sendmail to send out the mail as SMTP authorisation has not worked in the past.