could you try to authenticate
create a base64 encoded string
echo -ne '\0username\0password' | base64
then
openssl s_client -connect smtp.mailgun.com:587 -starttls smtp
and
AUTH PLAIN withthebase64stringfromabove
could you try to authenticate
create a base64 encoded string
echo -ne '\0username\0password' | base64
then
openssl s_client -connect smtp.mailgun.com:587 -starttls smtp
and
AUTH PLAIN withthebase64stringfromabove