Is there something wrong, or am I doing something wrong?
Set: the server
Set: the auth
Set: a message will be sent
Connecting to smtp.protonmail.ch at 587
Got: 220 mailsub002.protonmail.ch ESMTP Postfix
Sent: EHLO [172.17.0.20]
Got: 250-mailsub002.protonmail.ch
Got: 250-PIPELINING
Got: 250-SIZE 36480000
Got: 250-STARTTLS
Got: 250-ENHANCEDSTATUSCODES
Got: 250-8BITMIME
Got: 250 CHUNKING
Sent: STARTTLS
Got: 220 2.0.0 Ready to start TLS
Sent: EHLO [172.17.0.20]
Got: 250-mailsub002.protonmail.ch
Got: 250-PIPELINING
Got: 250-SIZE 36480000
Got: 250-AUTH PLAIN
Got: 250-ENHANCEDSTATUSCODES
Got: 250-8BITMIME
Got: 250 CHUNKING
Sent: AUTH LOGIN
Got: 535 5.7.8 Error: authentication failed: Invalid authentication mechanism
Is there something wrong, or am I doing something wrong?