GMail reports "(Your ISP) did not encrypt this message"

"[email protected] [blat]" <[email protected]> 08 Jul 2018 14:23:46 -0700
Newsgroups gmane.mail.blat
Message-ID <[email protected]>
Security: "(Your ISP) did not encrypt this message"
 The email went straight to junk folder.
 

 My blat.log indicates STARTTLS is initiated which I thought WAS encryption, but that might just be my ignorance. It seems quite a few club emails are going to junk mail despite me requesting inclusion in safe senders lists (which they may not bother to do of course).
 

 Anything I should do to try and improve things, is it a stunnel type of thing? (been using Blat for a looooong time now, without.
 

 2018.07.08 21:48:57 (Sun)------------Start of Session-----------------
Blat v3.2.19 (build : Nov 18 2017 03:14:40)
32-bit Windows, Full, Unicode
superDebug: init_winsock(), WSAStartup() returned 0 (NO_ERROR)
superDebug: Hostname <smtp.ISP_Hosting.co.uk> resolved to ip address 83.999.124.83
superDebug: Official hostname is smtp.ISP.co.uk
superDebug: Attempting to connect to ip address 83.999.124.83, on port 25
superDebug: Received 32 bytes:
superDebug: 00000  32 32 30 20 73 6D 74 70 32 2E 69 6E 74 65 72 64  220 mtp2.ISP_d
superDebug: 00010  6E 73 2E 63 6F 2E 75 6B 20 45 53 4D 54 50 0D 0A  ns.co.uk ESMTP..
<<<getline<<< 220 smtp2.ISP_dns.co.uk ESMTP
superDebug: Attempting to send 14 bytes:
superDebug: 00000  45 48 4C 4F 20 70 65 6E 67 65 72 73 0D 0A        EHLO pengers..  
>>>putline>>> EHLO pengers
superDebug: Received 111 bytes:
superDebug: 00000  32 35 30 2D 73 6D 74 70 32 2E 69 6E 74 65 72 64  250-smtp2.ISP_dnserd
superDebug: 00010  6E 73 2E 63 6F 2E 75 6B 0D 0A 32 35 30 2D 53 54  ns.co.uk..250-ST
superDebug: 00020  41 52 54 54 4C 53 0D 0A 32 35 30 2D 50 49 50 45  ARTTLS..250-PIPE
superDebug: 00030  4C 49 4E 49 4E 47 0D 0A 32 35 30 2D 38 42 49 54  LINING..250-8BIT
superDebug: 00040  4D 49 4D 45 0D 0A 32 35 30 2D 53 49 5A 45 20 34  MIME..250-SIZE 4
superDebug: 00050  31 39 34 33 30 34 30 0D 0A 32 35 30 20 41 55 54  1943040..250 AUT
superDebug: 00060  48 20 4C 4F 47 49 4E 20 50 4C 41 49 4E 0D 0A     H LOGIN PLAIN.. 
<<<getline<<< 250-smtp2.ISP_dns.co.uk
<<<getline<<< 250-STARTTLS
<<<getline<<< 250-PIPELINING
<<<getline<<< 250-8BITMIME
<<<getline<<< 250-SIZE 41943040
<<<getline<<< 250 AUTH LOGIN PLAIN
Sending C:\APPS\BUJFC\THISBODY.TXT to [email protected], [email protected]
Subject: Bollington United: Team message

 

 Many thanks for the program, your attention and any response.
 

 Regards Alan