Hello friends, I have a problem with the mail server.
I can send emails to gmail and other servers.
But if I reply an email from gmail I get the following error:
xxx@gmail.com: host gmail-smtp-in.l.google.com[2404:6800:4003:c0f::1b]
said: 550-5.7.26 This message does not have authentication information or
fails to 550-5.7.26 pass authentication checks. To best protect our users
from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26
https://support.google.com/mail/answer/81126#authentication for more 550
5.7.26 information. d1-20020a636801000000b003aa89c761acsi18498570pgc.798 -
gsmtp (in reply to end of DATA command)
if I do a test with mail-tester I get the following result:
can anyone think of what might be going on? thanks
