I am having some troubles with my qmail using SMTP routes via sendgrid. I have talked with their support and they do not see the server trying to sign in. I get this error
delivery 11: failure: Connected_to_184.108.40.206_but_sender_was_rejected./Remote_host_said:_550_Unauthenticated_senders_not_allowed/
I used the qmail setup here
I have tried removing and reinstalling qmail and installing the patch listed here
I also did the telnet test that was listed here
and the test passed with the same username and password I am using.
I would love to get this working and if anyone can help I will be very thankful.