Our server can not send email to yahoo since first virtualmin install, dkim, spf working fine also ip clean from any blacklist. Another yahoo email are work best.
Postfix mail queue:
host mta7.am0.yahoodns.net[18.104.22.168] said: 421 4.7.0 [TSS09] All messages from 107.xxx.57.xxx temporarily deferred due to user complaints - 22.214.171.124; see https://help.yahoo.com/kb/postmaster/SLN3326.html (in reply to MAIL FROM command)
delivery temporarily suspended: lost connection with mta7.am0.yahoodns.net[126.96.36.199] while sending RCPT TO
I tried a variety of postfix tutorials on google and see the problems here but to no avail.
Since I have saved a lot of emails, does anyone have a complete tutorial how to move to the exim mail server without interrupting existing email?