Here is imapsync 2.229 on host carina.dnshostcentral.com, a linux system with 0.9/15.4 free GiB of RAM, 62.78% used by processes. with Perl 5.26.3 and Mail::IMAPClient 3.42 Transfer started at Monday 27 October 2025-10-27 17:51:29 +0000 GMT PID is 35464 my PPID is 7465 Log file is LOG_imapsync/2025_10_27_17_51_29_075_info@kilimanjaropackages.com_info@kilimanjaropackages.com.txt ( to change it, use --logfile path ; or use --nolog to turn off logging ) Load is 2.32 2.68 2.82 3/1187 on 32 cores Current directory is /home/zaitatou/kilimanjaropackages.com 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 102.212.247.187 --user1 info@kilimanjaropackages.com --password1 MASKED --host2 carina.dnshostcentral.com --user2 info@kilimanjaropackages.com --password2 MASKED Temp directory is /tmp ( to change it use --tmpdir dirpath ) kill -QUIT 35464 # special behavior: call to sub catch_exit kill -TERM 35464 # special behavior: call to sub catch_exit kill -INT 35464 # special behavior: call to sub catch_reconnect kill -HUP 35464 # special behavior: call to sub catch_print kill -USR1 35464 # 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 35464 in /tmp/imapsync.pid Writing also my logfile name in /tmp/imapsync.pid : LOG_imapsync/2025_10_27_17_51_29_075_info@kilimanjaropackages.com_info@kilimanjaropackages.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 2.081 Crypt::OpenSSL::RSA 0.31 Data::Uniqid 0.12 Digest::HMAC_MD5 1.01 Digest::HMAC_SHA1 1.03 Digest::MD5 2.55 Encode 2.97 Encode::IMAPUTF7 1.05 File::Copy::Recursive 0.40 File::Spec 3.74 Getopt::Long 2.5 HTML::Entities 3.69 IO::Socket 1.38 IO::Socket::INET 1.35 IO::Socket::INET6 2.72 IO::Socket::IP 0.39 IO::Socket::SSL 2.066 IO::Tee 0.65 JSON 2.97001 JSON::WebToken 0.10 LWP 6.34 MIME::Base64 3.15 Mail::IMAPClient 3.42 Net::Ping 2.55 Net::SSLeay 1.88 Term::ReadKey 2.37 Test::MockObject 1.20180705 Time::HiRes 1.9758 URI::Escape 3.31 Unicode::String 2.10 Info: will resync flags for already transferred messages. Use --noresyncflags to not resync flags. Host1: probing ssl on port 993 ( use --nosslcheck to avoid this ssl probe ) Host1: sslcheck detected open ssl port 993 so turning ssl on (use --nossl1 --notls1 to turn off SSL and TLS wizardry) Host2: probing ssl on port 993 ( use --nosslcheck to avoid this ssl probe ) Host2: sslcheck detected open ssl port 993 so turning ssl on (use --nossl2 --notls2 to turn off SSL and TLS wizardry) 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 LOGIN 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 [102.212.247.187] port [993] user [info@kilimanjaropackages.com] Host2: IMAP server [carina.dnshostcentral.com] port [993] user [info@kilimanjaropackages.com] Host1: connecting and login on host1 [102.212.247.187] port [993] with user [info@kilimanjaropackages.com] Host1 IP address: 102.212.247.187 Local IP address: 178.159.12.230 Host1 banner: * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE NAMESPACE LITERAL+ AUTH=PLAIN AUTH=LOGIN] Dovecot ready. Host1 capability before authentication: IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE NAMESPACE LITERAL+ AUTH=PLAIN AUTH=LOGIN AUTH Host1: 102.212.247.187 says it has CAPABILITY for AUTHENTICATE LOGIN Host1 info: authmech [LOGIN] user [info@kilimanjaropackages.com] authuser [] IsUnconnected [] Host1 failure: Error login on [102.212.247.187] with user [info@kilimanjaropackages.com] auth [LOGIN]: 2 NO [AUTHENTICATIONFAILED] Authentication failed. Host1: failed login on [102.212.247.187] with user [info@kilimanjaropackages.com] auth [LOGIN] Host2: connecting and login on host2 [carina.dnshostcentral.com] port [993] with user [info@kilimanjaropackages.com] Host2 IP address: 178.159.12.230 Local IP address: 178.159.12.230 Host2 banner: * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE NAMESPACE LITERAL+ AUTH=PLAIN AUTH=LOGIN] Dovecot ready. Host2 capability before authentication: IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE NAMESPACE LITERAL+ AUTH=PLAIN AUTH=LOGIN AUTH Host2: carina.dnshostcentral.com says it has CAPABILITY for AUTHENTICATE LOGIN Host2: success login on [carina.dnshostcentral.com] with user [info@kilimanjaropackages.com] auth [LOGIN] or [LOGIN] ++++ Listing 1 errors encountered during the sync ( avoid this listing with --noerrorsdump ). Err 1/1: Host1 failure: Error login on [102.212.247.187] with user [info@kilimanjaropackages.com] auth [LOGIN]: 2 NO [AUTHENTICATIONFAILED] Authentication failed. The most frequent error is ERR_AUTHENTICATION_FAILURE_USER1. Check the credentials for info@kilimanjaropackages.com. Exiting with return value 161 (EXIT_AUTHENTICATION_FAILURE_USER1) 1/50 nb_errors/max_errors PID 35464 Removing pidfile /tmp/imapsync.pid Disconnecting from host2 carina.dnshostcentral.com user2 info@kilimanjaropackages.com Log file is LOG_imapsync/2025_10_27_17_51_29_075_info@kilimanjaropackages.com_info@kilimanjaropackages.com.txt ( to change it, use --logfile filepath ; or use --nolog to turn off logging )