[exim] Exim 4.88(9): failed to read pipe from transport

Hello.

Please help solve a problem.

Exim 4.88 #2 (FreeBSD 11.0)

When a message sent to one domain on Office365 to many users (above 30)
periodically have frozen message :(

2017-02-17 14:51:23 1cehiT-000Ooq-Th ==
user1@??? R=dnslookup T=remote_smtp defer (0)
H=company-mail-onmicrosoft-com.mail.protection.outlook.com
[213.199.154.106]: failed to read pipe from transport process 99963 for
transport smtp: required size=2816 > remaining size=2736 and
unfinished=false
2017-02-17 14:51:23 1cehiT-000Ooq-Th ==
user2@??? R=dnslookup T=remote_smtp defer (-1):
failed to read pipe from transport process 99963 for transport smtp:
required size=2816 > remaining size=2736 and unfinished=false
2017-02-17 14:51:23 1cehiT-000Ooq-Th ==
user3@??? R=dnslookup T=remote_smtp defer (-1):
failed to read pipe from transport process 99963 for transport smtp:
required size=2816 > remaining size=2736 and unfinished=false


Exim 4.89_RC5 not resolve problem.

My config:
tls_certificate = *.cer
tls_privatekey = *.key
tls_advertise_hosts = *
tls_dhparam = eximdh.key
tls_require_ciphers =
ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
openssl_options = +dont_insert_empty_fragments +no_sslv2 +no_sslv3

chunking_advertise_hosts =

In smtp transports:
hosts_try_chunking =


Exim version 4.89_RC5 #2 (FreeBSD 11.0) built 16-Feb-2017 14:01:33

Support for: iconv() use_setclassresources Perl Expand_dlfunc OpenSSL
Content_Scanning DKIM TCP_Fast_Open Experimental_SPF Experimental_SRS
Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm
dbmjz dbmnz dnsdb dsearch ldap ldapdn ldapm mysql passwd
Authenticators:
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/mbx autoreply pipe smtp


--
Mikhail Golub