Try this. Run conf.pl (/usr/share/squirrelmail/config/conf.pl) Setup server settings
Biju Jose From: ChandranManikandan [mailto:kand...@gmail.com] Sent: 20 November 2019 16:20 To: qmailtoaster-list@qmailtoaster.com Subject: [qmailtoaster] squirrelmail outgoing error on centos 7 Hi Friends, I have installed qmt on centos 7 and tried to send an email it getting below message. Message not sent. Server replied: Encryption required for requested authentication mechanism 538 auth not available without TLS (#5.3.3) Could anyone facing this issue? and what causes? -- Regards, Manikandan.C
