I have in logs messages like below: Code: 21BEE13D01E 41789 Tue Oct 23 05:45:58 [email protected] (host mta5.am0.yahoodns.net[98.137.159.24] said: 421 4.7.0 [TSS04] Messages from 54.38.201.129 temporarily deferred due to user complaints - 4.16.55.1; see https://help.yahoo.com/kb/postmaster/SLN3434.html (in reply to MAIL FROM command)) [email protected] Code: C7FCC13D017 11048 Tue Oct 23 08:55:36 [email protected] (host smtp.dmz.fedex.com[199.81.212.146] refused to talk to me: 554 5.7.1 You are not allowed to connect.) [email protected] Code: 693F813D03F 6183 Tue Oct 23 12:45:05 [email protected] (host smtp.hosting.tp.pl[217.97.216.15] said: 450 4.7.1 : Recipient address rejected: Policy Rejection - Prosze sprobowac pozniej / Please try again later. (in reply to RCPT TO command)) [email protected] Code: 70D3213C189 32008 Mon Oct 22 09:54:05 [email protected] (host mta5.am0.yahoodns.net[66.218.85.52] said: 421 4.7.0 [TSS04] Messages from 54.38.201.129 temporarily deferred due to user complaints - 4.16.55.1; see https://help.yahoo.com/kb/postmaster/SLN3434.html (in reply to MAIL FROM command)) [email protected] Both domains on the server has SPF, DKIM, DMARC but all the same I got above in logs. IP of the server is not on spam lists. What should I do? PS Domains and IP of the server is changed. I can give real names/ip's if needed.