Here is imapsync 2.229 on host vps-13651112.gugao.com.br, a linux system with 0.3/3.6 free GiB of RAM, 36.97% used by processes.
with Perl 5.32.1 and Mail::IMAPClient 3.42
Transfer started at Monday 19 May 2025-05-19 03:17:00 -0300 -03
PID is 3164851 my PPID is 3150677
Log file is LOG_imapsync/2025_05_19_03_17_00_985_suporte@guguysupermercados.com.br_suporte@guguysupermercados.com.br.txt ( to change it, use --logfile path ; or use --nolog to turn off logging )
Load is 0.48 0.42 0.36 1/437 on 3 cores
Current directory is /home/guguysupermercad/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:
/bin/imapsync --host1 192.185.223.35 --user1 suporte@guguysupermercados.com.br --password1 MASKED --host2 162.240.170.104 --user2 suporte@guguysupermercados.com.br --password2 MASKED --ssl1 --ssl2 --authmech1 LOGIN --authmech2 LOGIN --syncinternaldates --no-modulesversion
Temp directory is /tmp ( to change it use --tmpdir dirpath )
kill -QUIT 3164851 # special behavior: call to sub catch_exit
kill -TERM 3164851 # special behavior: call to sub catch_exit
kill -INT 3164851 # special behavior: call to sub catch_reconnect
kill -HUP 3164851 # special behavior: call to sub catch_print
kill -USR1 3164851 # 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 3164851 in /tmp/imapsync.pid
Writing also my logfile name in /tmp/imapsync.pid : LOG_imapsync/2025_05_19_03_17_00_985_suporte@guguysupermercados.com.br_suporte@guguysupermercados.com.br.txt
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 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 [192.185.223.35] port [993] user [suporte@guguysupermercados.com.br]
Host2: IMAP server [162.240.170.104] port [993] user [suporte@guguysupermercados.com.br]
Host1: connecting and login on host1 [192.185.223.35] port [993] with user [suporte@guguysupermercados.com.br]
Host1 IP address: 192.185.223.35 Local IP address: 162.240.170.104
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: 192.185.223.35 says it has CAPABILITY for AUTHENTICATE LOGIN
Host1: success login on [192.185.223.35] with user [suporte@guguysupermercados.com.br] auth [LOGIN] or [LOGIN]
Host2: connecting and login on host2 [162.240.170.104] port [993] with user [suporte@guguysupermercados.com.br]
Host2 IP address: 162.240.170.104 Local IP address: 162.240.170.104
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: 162.240.170.104 says it has CAPABILITY for AUTHENTICATE LOGIN
Host2 info: authmech [LOGIN] user [suporte@guguysupermercados.com.br] authuser [] IsUnconnected []
Host2 failure: Error login on [162.240.170.104] with user [suporte@guguysupermercados.com.br] auth [LOGIN]: 2 NO [AUTHENTICATIONFAILED] Authentication failed.
Host2: failed login on [162.240.170.104] with user [suporte@guguysupermercados.com.br] auth [LOGIN]
++++ Listing 1 errors encountered during the sync ( avoid this listing with --noerrorsdump ).
Err 1/1: Host2 failure: Error login on [162.240.170.104] with user [suporte@guguysupermercados.com.br] auth [LOGIN]: 2 NO [AUTHENTICATIONFAILED] Authentication failed.
The most frequent error is ERR_AUTHENTICATION_FAILURE_USER2. Check the credentials for suporte@guguysupermercados.com.br.
Exiting with return value 162 (EXIT_AUTHENTICATION_FAILURE_USER2) 1/50 nb_errors/max_errors PID 3164851
Removing pidfile /tmp/imapsync.pid
Disconnecting from host1 192.185.223.35 user1 suporte@guguysupermercados.com.br
Log file is LOG_imapsync/2025_05_19_03_17_00_985_suporte@guguysupermercados.com.br_suporte@guguysupermercados.com.br.txt ( to change it, use --logfile filepath ; or use --nolog to turn off logging )