Hi everyone? Just want to ask why my emails from sogo mail are not being received by yahoo accounts. Undelivered message comes a few days later saying the following error:

Action: failed
Status: 4.4.1
Diagnostic-Code: X-Postfix; delivery temporarily suspended: connect to mta6.am0.yahoodns.net[98.136.216.25]:25: Connection timed out


Sometimes error will state that my IP is in the spamhaus list but whenever I checked it, it's is not there in the list.