Hi! I'm having some problems with QMail under Plesk8.1 Some mails from certain providers are delayed because of problems with TLS. From logging of the other providers, I see that the problem is caused by TLS: Jan 18 12:55:42 provider1 sendmail: m0IBrgoB008537: to=<email@example.com>, delay=00:02:00, xdelay=00:02:00, mailer=esmtp, pri=120529, relay=mail.host.tld. [xxx.xxx.xxx.xxx], dsn=4.0.0, stat=Deferred: 403 4.7.0 TLS handshake failed. Jan 18 14:04:18 provider1 sendmail: m0IBrgoB008537: to=<firstname.lastname@example.org>, delay=01:10:36, xdelay=00:00:03, mailer=esmtp, pri=210529, relay=mail.host.tld. [xxx.xxx.xxx.xxx], dsn=2.0.0, stat=Sent (ok 1200661208 qp 28544) So my first guess was to disable TLS on my server, but there is almost no information about disabling TLS and when I search SWSoft on TLS, it finds nothing. BTW: Why does sending works the second time? Did the server at provider1 disable TLS the second time? I hope that someone can help me with this. Eighter by disabling TLS or by any other solution. Below the banner of my mailserver. [root ~]# telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. 220 <mailserver> ESMTP ehlo localhost 250-<mailserver> 250-STARTTLS 250-PIPELINING 250 8BITMIME TIA!