I setup the simplest outgoing email server possible with ssmtp. It is giving me the error Authorization failed (535 Authentication credentials invalid). Here is my configuration without comments:# /etc/ssmtp/ssmtp.confroot=myemail@gmx.commailhub=mail.gmx.com:465rewriteDomain=gmx.comhostname=HP-Q101rewriteDomain=gmx.comFromLineOverride=YESAuthUser=myemail@gmx.comAuthPass=my@super&secret*pa$$wordUseTLS=YESRunning output:~$ ssmtp -vvv webmaster@example.com < msg[<-] 220 gmx.com (mrgmxus001) Nemesis ESMTP Service ready[->] EHLO ASUS-N53SM[<-] 250 AUTH LOGIN PLAIN[->] AUTH LOGIN[<-] 334 VXNlcm5hbWU6[->] c3VwZXZvMZExZGdteZ3jb33=[<-] 334 ZZFzc3dvcmZ3[<-] 535 Authentication credentials invalidssmtp: Authorization failed (535 Authentication credentials invalid)I understand that this implies a wrong username or password, but I have confirmed the password by copying it directly from my password manager. I also tried setting my user name to only myemail.Anyone have luck setting up a GMX account?If the problem isn't username/password, what could it possibly be?
Setup GMX email with SSMTP
email;ssmtp
Change your config to match this:# /etc/ssmtp/ssmtp.confroot=youremail@gmx.commailhub=mail.gmx.com:587rewriteDomain=gmx.comhostname=gmx.comrewriteDomain=gmx.comFromLineOverride=YESAuthUser=youremail@gmx.comAuthPass=yourpasswordUseSTARTTLS=YESSource:https://help.gmx.com/en/applications/pop3.html