TLS Delivery Error for receiving email - Have started being blocked by my server from receiving from most email domains (as some still work like gmail)
All certificates valid & DNS entries are all loaded against my domain.
last actions - Have not have issue receiving for few days since initial build. Then this started after a server restart while getting sendgrid smtp service working.
Example Logs:
Apr 5 19:31:24 box postfix/smtpd[2638]: connect from “3rdPartyURL:IP”
Apr 5 19:31:24 box postfix/smtpd[2638]: lost connection after EHLO from “3rdPartyURL:IP”
Apr 5 19:31:24 box postfix/smtpd[2638]: disconnect from “3rdPartyURL:IP” ehlo=1 mail=0/1 rset=0/1 commands=1/3
and
Apr 5 19:33:35 box postfix/smtpd[2873]: connect from “3rdPartyURL:IP”
Apr 5 19:33:35 box postfix/smtpd[2873]: lost connection after EHLO from “3rdPartyURL:IP”
Apr 5 19:33:35 box postfix/smtpd[2873]: disconnect from “3rdPartyURL:IP” ehlo=1 mail=0/1 rset=0/1 commands=1/3
EMAIL RETURN ERROR MSG:
The following message to <MyInfo@MyDomainInfo> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 530-‘5.7.0 Must issue a STARTTLS command first’
Attached in error return email txt file:
Reporting-MTA: dns; “3rdPartyURL”
Final-Recipient: rfc822;donovan@stephens.vip
Action: failed
Status: 5.0.0 (permanent failure)
Remote-MTA: dns; [MY-IP]
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 530-‘5.7.0 Must issue a STARTTLS command first’ (delivery attempts: 0)