cannot get IOS or MacOSX to connect to dovecot:995 since upgraded Mac or iPhone

Versions:

[[email protected]]$ uname -a
Linux www.wls.org 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
[[email protected]]$ dovecot --version
2.2.36 (1f10bfa63)

My Certs:

Testing cert dovecot.key
unable to load certificate
139668060415888:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:707:Expecting: TRUSTED CERTIFICATE
lrwxrwxrwx 1 root root 21 Mar 25 15:44 dovecot.key -> dovecot.key.old_sep_2

Testing chain dovecot.pem
SHA1 Fingerprint=4A:29:34:1D:D5:9C:67:59:FA:31:7E:FF:F4:53:F8:DB:25:73:15:07
subject= /OU=IMAP server/CN=imap.example.com/[email protected]
issuer= /OU=IMAP server/CN=imap.example.com/[email protected]
serial=C8AA4C688A3F2638
b5bd7939
notBefore=Sep  2 20:17:33 2018 GMT
notAfter=Sep  2 20:17:33 2019 GMT
lrwxrwxrwx 1 root root 21 Mar 25 15:44 dovecot.pem -> dovecot.crt.old_sep_2

New Certs:

Testing key ca.key.3.13.4
RSA key ok
lrwxrwxrwx 1 root root 31 Mar 13 14:14 ca.key.3.13.4 -> ../../tls/private/ca.key.3.13.4

Testing chain ca.crt.3.13.4
SHA1 Fingerprint=79:69:88:2A:E0:BF:58:A8:21:E3:88:12:8D:45:20:4F:FD:68:33:63
subject= /C=XX/ST= /L= /O= /OU=IMAP server/CN=imap.example.com/[email protected]
issuer= /C=XX/ST= /L= /O= /OU=IMAP server/CN=imap.example.com/[email protected]
serial=B912DD19FEDC441C
402b4e2a
notBefore=Mar 13 20:02:58 2026 GMT
notAfter=Mar 13 20:02:58 2027 GMT
lrwxrwxrwx 1 root root 29 Mar 13 14:13 ca.crt.3.13.4 -> ../../tls/certs/ca.crt.3.13.4

They install OK, dovecot starts; but iPhone and mac cannot connect to pop3

Cannot get my iPhone or Mac to accept new certs from lets encrypt, et. al.

This is a new problem, started recently.

My existing cert expired in 2016

William
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