Here is imapsync 2.229 on host server.ibrix.digital, a linux system with 2.1/7.5 free GiB of RAM, 39.14% used by processes. with Perl 5.32.1 and Mail::IMAPClient 3.42 Transfer started at Friday 17 July 2026-07-17 16:40:08 +0200 CEST PID is 627311 my PPID is 627220 Log file is LOG_imapsync/2026_07_17_16_40_08_040_sales1@dahshantt.com_sales1@dahshantt.com.txt ( to change it, use --logfile path ; or use --nolog to turn off logging ) Load is 0.43 0.26 0.26 1/341 on 4 cores Current directory is /root/cpanel3-skel/public_html Real user id is root (uid 0) Effective user id is root (euid 0) $RCSfile: imapsync,v $ $Revision: 2.229 $ $Date: 2022/09/14 18:08:24 $ Command line used, run by /usr/bin/perl: /usr/bin/imapsync --host1 imapro.zoho.com --port1 993 --ssl1 --user1 sales1@dahshantt.com --password1 MASKED --host2 server.ibrix.digital --port2 993 --ssl2 --user2 sales1@dahshantt.com --password2 MASKED --justlogin --authmech1 PLAIN Temp directory is /tmp ( to change it use --tmpdir dirpath ) kill -QUIT 627311 # special behavior: call to sub catch_exit kill -TERM 627311 # special behavior: call to sub catch_exit kill -INT 627311 # special behavior: call to sub catch_reconnect kill -HUP 627311 # special behavior: call to sub catch_print kill -USR1 627311 # special behavior: call to sub toggle_sleep File /tmp/imapsync.pid does not exist PID file is /tmp/imapsync.pid ( to change it, use --pidfile filepath ; to avoid it use --pidfile "" ) Writing my PID 627311 in /tmp/imapsync.pid Writing also my logfile name in /tmp/imapsync.pid : LOG_imapsync/2026_07_17_16_40_08_040_sales1@dahshantt.com_sales1@dahshantt.com.txt Modules version list ( use --no-modulesversion to turn off printing this Perl modules list ): Authen::NTLM 1.09 CGI Not installed Compress::Zlib 2.102 Crypt::OpenSSL::RSA 0.33 Data::Uniqid 0.12 Digest::HMAC_MD5 1.01 Digest::HMAC_SHA1 1.03 Digest::MD5 2.58 Encode 3.08 Encode::IMAPUTF7 1.05 File::Copy::Recursive 0.45 File::Spec 3.78 Getopt::Long 2.52 HTML::Entities 3.76 IO::Socket 1.43 IO::Socket::INET 1.41 IO::Socket::INET6 2.72 IO::Socket::IP 0.41 IO::Socket::SSL 2.073 IO::Tee 0.65 JSON 4.03 JSON::WebToken 0.10 LWP 6.53 MIME::Base64 3.16 Mail::IMAPClient 3.42 Net::Ping 2.74 Net::SSLeay 1.94 Term::ReadKey 2.38 Test::MockObject 1.20200122 Time::HiRes 1.9764 URI::Escape 5.09 Unicode::String 2.10 Info: will resync flags for already transferred messages. Use --noresyncflags to not resync flags. SSL debug mode level is --debugssl 1 (can be set from 0 meaning no debug to 4 meaning max debug) Host1: SSL default mode is like --sslargs1 "SSL_verify_mode=0", meaning for host1 SSL_VERIFY_NONE, ie, do not check the server certificate. Host1: Use --sslargs1 SSL_verify_mode=1 to have SSL_VERIFY_PEER, ie, check the server certificate. of host1 Host2: SSL default mode is like --sslargs2 "SSL_verify_mode=0", meaning for host2 SSL_VERIFY_NONE, ie, do not check the server certificate. Host2: Use --sslargs2 SSL_verify_mode=1 to have SSL_VERIFY_PEER, ie, check the server certificate. of host2 Info: turned ON syncinternaldates, will set the internal dates (arrival dates) on host2 same as host1. Host1: will try to use PLAIN authentication on host1 Host2: will try to use LOGIN authentication on host2 Host1: imap connection timeout is 120 seconds Host2: imap connection timeout is 120 seconds Host1: imap connection keepalive is on on host1. Use --nokeepalive1 to disable it. Host2: imap connection keepalive is on on host2. Use --nokeepalive2 to disable it. Host1: IMAP server [imapro.zoho.com] port [993] user [sales1@dahshantt.com] Host2: IMAP server [server.ibrix.digital] port [993] user [sales1@dahshantt.com] Host1: connecting and login on host1 [imapro.zoho.com] port [993] with user [sales1@dahshantt.com] DEBUG: ...erl5/IO/Socket.pm:48: local error: IO::Socket::IP configuration failed Host1 failure: can not open imap connection on host1 [imapro.zoho.com] with user [sales1@dahshantt.com]: Unable to connect to imapro.zoho.com: IO::Socket::IP configuration failed Invalid argument Host2: connecting and login on host2 [server.ibrix.digital] port [993] with user [sales1@dahshantt.com] Host2 IP address: 77.237.236.26 Local IP address: 77.237.236.26 Host2 banner: * OK [CAPABILITY IMAP4rev1 LOGIN-REFERRALS ID ENABLE IDLE SASL-IR LITERAL+ AUTH=PLAIN AUTH=LOGIN] Dovecot ready. Host2 capability before authentication: IMAP4rev1 LOGIN-REFERRALS ID ENABLE IDLE SASL-IR LITERAL+ AUTH=PLAIN AUTH=LOGIN AUTH Host2: server.ibrix.digital says it has CAPABILITY for AUTHENTICATE LOGIN Host2: success login on [server.ibrix.digital] with user [sales1@dahshantt.com] auth [LOGIN] or [LOGIN] ++++ Listing 1 errors encountered during the sync ( avoid this listing with --noerrorsdump ). Err 1/1: Host1 failure: can not open imap connection on host1 [imapro.zoho.com] with user [sales1@dahshantt.com]: Unable to connect to imapro.zoho.com: IO::Socket::IP configuration failed Invalid argument The most frequent error is ERR_CONNECTION_FAILURE_HOST1. Check that host1 imapro.zoho.com on port 993 is the right IMAP server to be contacted for your mailbox. Exiting with return value 101 (EXIT_CONNECTION_FAILURE_HOST1) 1/50 nb_errors/max_errors PID 627311 Removing pidfile /tmp/imapsync.pid Disconnecting from host2 server.ibrix.digital user2 sales1@dahshantt.com Log file is LOG_imapsync/2026_07_17_16_40_08_040_sales1@dahshantt.com_sales1@dahshantt.com.txt ( to change it, use --logfile filepath ; or use --nolog to turn off logging )