Can’t authenticate SMTP & don’t get notifications

I have contacted my host but they think it’s a plugin problem – though I turned them all off and back on and tested them.

The first issue (that is related to the second issue) is that I don’t get email notifications from my site such as when there’s a new order or a new comment. The bell notification (which is connected to wordpress.com and Jetpack) does not work – I get a slow spinning wheel. I do have WP Rocket installed, but I turned it off to test and still got the spinning wheel.

The second issue is that I tried to fix the first issue by installing WP Mail SMTP and tried to route it through my hosting server (BlueHost). It says that it failed to authenticate. I triple-checked everything and it seems to suggest that it’s my password that is the problem but I know it’s not: I logged out and into my email with the same password and copied that over into the SMTP field (I know…they recommend storing it in wp-config.php but I don’t know how to do that). But I cannot get a test email to come through. I tried the test with my domain email and my personal email; neither one worked.

Here is the Error Log:

Versions:
WordPress: 6.0.1
WordPress MS: No
PHP: 8.0.16
WP Mail SMTP: 3.5.1

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: Could not authenticate.
Host: mail.artfunky.com
Port: 587
SMTPSecure: tls
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.1.1m 14 Dec 2021
Apache.mod_security: No

Debug:
Email Source: WP Mail SMTP Mailer: Other SMTP SMTP Error: Could not authenticate.

SMTP Debug:
2022-07-15 17:31:08 Connection: opening to mail.artfunky.com:587, timeout=300, options=array()
 2022-07-15 17:31:08 Connection: opened
 2022-07-15 17:31:08 SERVER -> CLIENT: 220-box2255.bluehost.com ESMTP Exim 4.95 #2 Fri, 15 Jul 2022 11:31:08 -0600 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.
 2022-07-15 17:31:08 CLIENT -> SERVER: EHLO artfunky.com
 2022-07-15 17:31:08 SERVER -> CLIENT: 250-box2255.bluehost.com Hello 173-254-35-155.unifiedlayer.com [173.254.35.155]250-SIZE 52428800250-8BITMIME250-PIPELINING250-PIPE_CONNECT250-AUTH PLAIN LOGIN250-STARTTLS250 HELP
 2022-07-15 17:31:08 CLIENT -> SERVER: STARTTLS
 2022-07-15 17:31:08 SERVER -> CLIENT: 220 TLS go ahead
 2022-07-15 17:31:08 CLIENT -> SERVER: EHLO artfunky.com
 2022-07-15 17:31:08 SERVER -> CLIENT: 250-box2255.bluehost.com Hello 173-254-35-155.unifiedlayer.com [173.254.35.155]250-SIZE 52428800250-8BITMIME250-PIPELINING250-PIPE_CONNECT250-AUTH PLAIN LOGIN250 HELP
 2022-07-15 17:31:08 CLIENT -> SERVER: AUTH LOGIN
 2022-07-15 17:31:08 SERVER -> CLIENT: 334 VXNlcm5hbWU6
 2022-07-15 17:31:08 CLIENT -> SERVER: [credentials hidden]
 2022-07-15 17:31:08 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
 2022-07-15 17:31:08 CLIENT -> SERVER: [credentials hidden]
 2022-07-15 17:31:10 SERVER -> CLIENT: 535 Incorrect authentication data
 2022-07-15 17:31:10 SMTP ERROR: Password command failed: 535 Incorrect authentication data
 SMTP Error: Could not authenticate.
 2022-07-15 17:31:10 CLIENT -> SERVER: QUIT
 2022-07-15 17:31:10 SERVER -> CLIENT: 221 box2255.bluehost.com closing connection
 2022-07-15 17:31:10 Connection: closed
 SMTP Error: Could not authenticate.

The page I need help with: [log in to see the link]