Authentication failed error 535

Hi there I have made smtp server with cyber panel but i am unable to acces cyber panel web mail and got error this error Authentication failed
Server message: AUTHENTICATIONFAILED Authentication failed.

and when i try to send emails with email server >> AUTH PLAIN AGRhdmlkAHNkRlNERnM0JSQjJSQjbmJ2bk5LPCopOGl5dWo=
<< 535 5.7.8 Error: authentication failed:
ERROR: 535: 5.7.8 Error: authentication failed:

Welcome @abdul545 Happy you are here

If you are trying to access SnappyMail admin you can trace the password here

nano /usr/local/lscp/cyberpanel/rainloop/data/_data_/_default_/admin_password.txt

If this password does not work you can reset it by following this SnappyMail Admin Access - #4 by rahmanbd

Thanks a lot for our help but I am unable to login from my email associated with domain .because i can send emails through that email I am using the correct login credentials but still got the Server message: AUTHENTICATIONFAILED Authentication failed. error

@josephgodwinke do you have any about that?

Run and post contents here

cat /var/log/mail.err
cat /var/log/maillog

@josephgodwinke by running that command it shows me

Jan 10 15:19:56 joy dovecot: auth-worker(105351): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 15:20:29 joy dovecot: auth-worker(105351): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 15:20:39 joy dovecot: auth-worker(105351): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 15:22:41 joy dovecot: auth-worker(105373): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 15:23:02 joy dovecot: auth-worker(105373): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 15:25:02 joy dovecot: auth: Error: read(anvil-auth-penalty) failed: EOF
Jan 10 15:25:02 joy dovecot: auth: Error: net_connect_unix(anvil-auth-penalty) failed: Connection refused
Jan 10 15:25:02 joy postfix/postmap[110754]: fatal: usage: postmap [-NfinoprsuUvw] [-c config_dir] [-d key] [-q key] [map_type:]file…
Jan 10 15:25:05 joy postfix/postmap[110916]: fatal: usage: postmap [-NfinoprsuUvw] [-c config_dir] [-d key] [-q key] [map_type:]file…
Jan 10 20:07:38 joy dovecot: auth-worker(114321): Error: sql([email protected],::1,<iVyAb+7xxrwAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 20:24:02 joy dovecot: auth-worker(114606): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 20:25:06 joy dovecot: auth-worker(114615): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 20:39:23 joy dovecot: auth-worker(119982): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 20:39:42 joy dovecot: auth-worker(119982): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 20:39:56 joy dovecot: auth-worker(119982): Error: sql([email protected],::1,<rA/B4u7xSr0AAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 10 20:40:40 joy dovecot: auth-worker(119982): Error: sql([email protected],::1,<TM+k5e7xTr0AAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 09:41:55 joy dovecot: auth-worker(132616): Error: sql([email protected],167.172.81.142): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 10:10:37 joy dovecot: auth-worker(133213): Error: sql([email protected],::1,<3/gzNvrxysAAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 11:25:28 joy dovecot: auth-worker(134058): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 11:28:18 joy dovecot: auth-worker(134268): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 11:43:23 joy dovecot: auth-worker(134428): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 11:43:31 joy dovecot: auth-worker(134428): Error: sql([email protected],::1,<U+k7gvvxUMEAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 11:48:54 joy dovecot: auth-worker(134447): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 11:49:04 joy dovecot: auth-worker(134447): Error: sql([email protected],::1,<9qMNlvvxXMEAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 11:49:10 joy dovecot: auth-worker(134447): Error: sql([email protected],::1,<02mmlvvxXsEAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 12:00:03 joy dovecot: auth-worker(134508): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 12:00:25 joy dovecot: auth-worker(134508): Error: sql([email protected],::1,<2ermvvvxbsEAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:28:55 joy dovecot: auth-worker(138493): Error: sql([email protected],::1,<7gOxVQDy+sIAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:30:44 joy dovecot: auth-worker(139261): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:30:54 joy dovecot: auth-worker(139261): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:36:22 joy dovecot: auth-worker(139350): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:36:34 joy dovecot: auth-worker(139350): Error: sql([email protected],::1,<Yt/ScADyDsMAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:48:09 joy dovecot: auth-worker(139681): Error: sql([email protected],167.172.81.142): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:48:29 joy dovecot: auth-worker(139681): Error: sql([email protected],167.172.81.142): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 17:49:22 joy dovecot: auth-worker(139681): Error: sql([email protected],167.172.81.142): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 21:43:34 joy dovecot: auth-worker(143637): Error: sql([email protected],::1,<9j5m5APyMMQAAAAAAAAAAAAAAAAAAAAB>): Invalid password in passdb: crypt() failed: Invalid argument
Jan 11 21:45:22 joy dovecot: auth-worker(143644): Error: sql([email protected],::1,): Invalid password in passdb: crypt() failed: Invalid argument

and for second one it shows me
cat /var/log/maillog
cat: /var/log/maillog: No such file or directory

Are you using the correct credentails? Try change email password and try again

yes correct credentails

I have changed many times

@josephgodwinke Now I recently change my email pass and try to access webmail and got this error
Authentication failed
Server message: AUTHENTICATIONFAILED Authentication failed.

@josephgodwinke brother what can i do now?

Can you log into snappymail admin?

yes @josephgodwinke by applying your above given commands i can do that very easily and thanks a lot for your help

I want you to log into snappymail admin and go to https://SERVER_URL:8090/snappymail/?admin#/domains and select the domain you are trying to log into. Test all configs for that domain and post screenshot here

I am more so interested in SMTP test

ok I am sending you the screenshots @josephgodwinke
oops they restrict me to post only one media


I got this error when i am trying to access webmail @josephgodwinke

now what i do @josephgodwinke

Click TEST

You were running a digital ocean droplet before you changed over to Linode.

The issue looked like SMTP restrictions which we could not identify. However, DigitalOcean Droplets can have SMTP blocked due to reasons like bad firewall, built-in restrictions, spam protection.

To fix this contact Digital Ocean support to help you open the SMTP ports since setting up all-port outgoing rules the issue will still persist.