SSL SMTP-IN failure after upgrade from 8 to 10

Support General Configuration
1

If this topic is inappropriate please move to where it belongs.

After said upgrade one partner IP has been rejected on SMTP-IN thus:

2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: [192.168.1.2:25] connection accepted from [216.160.25.105:55950]
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: Set remote delivery to none
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: Greylist disabled
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: Set max data size to 10240 KB
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: Set max received headers to 30
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: Maximum recipient count set to 1000
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: Wait for processing response at least 10 seconds
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: STARTTLS extension allowed
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: 8BIT MIME accepted
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: BINARY DATA extension allowed
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: PIPELINING extension allowed
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: DSN extension denied
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: Set local delivery to all
2019-10-11 19:13:52 -0400 02 x2mailx SMTP-IN:000048E3: SSL alert remote 216.160.25.105:55950, undefined:fatal:handshake failure
2019-10-11 19:13:52 -0400 04 x2mailx SMTP-IN:000048E3: Error initializing TLS
2019-10-11 19:13:52 -0400 08 x2mailx SMTP-IN:000048E3: closing session from [216.160.25.105]

Any suggestion would be welcome.

2

This article may be relevant:

https://www.axigen.com/knowledgebase/How-to-configure-the-TLS-settings-for-SMTP-incoming-and-outgoing-in-Axigen-iX-9-0-and-X-10-0-for-compatibility-with-older-mail-servers_342.html

Let us know if, after implementing these recommendations, things are resolved for you.

Bogdan