Your domain is not allowed in header From

Well Hello There

I’m using namecheap webhost and trying to send mails from web@domain to info@domain. Getting the below error and have no idea how to fix this. Please help

I think the credentials are correct according to the log.

Versions:
WordPress: 5.2.3
WordPress MS: No
PHP: 7.2.22
WP Mail SMTP: 1.6.2

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: The following recipients failed: [email protected]: "Your IP: *** : Your domain resortspa.com is not allowed
in header From"
Host: resortspa.com
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(false)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.0.2k 26 Jan 2017
Apache.mod_security: No

Debug:
Mailer: Other SMTP
PHPMailer was able to connect to SMTP server but failed while trying to send an email.

SMTP Debug:
2019-10-07 10:45:48 Connection: opening to ssl://resortspa.com:465, timeout=300, options=array (
)
2019-10-07 10:45:48 Connection: opened
2019-10-07 10:45:48 SERVER -> CLIENT: 220-host45.registrar-servers.com ESMTP Exim 4.92 #2 Mon, 07 Oct 2019 06:45:48 -0400
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
2019-10-07 10:45:48 CLIENT -> SERVER: EHLO www.resortspa.com
2019-10-07 10:45:48 SERVER -> CLIENT: 250-host45.registrar-servers.com Hello www.resortspa.com []
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250 HELP
2019-10-07 10:45:48 CLIENT -> SERVER: AUTH LOGIN
2019-10-07 10:45:48 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2019-10-07 10:45:48 CLIENT -> SERVER: Y2FtZWxsaWF3ZWJAY2FtZWxsaWFyZXNvcnRzcGEuY29t
2019-10-07 10:45:48 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2019-10-07 10:45:48 CLIENT -> SERVER: STFSU2J9cEtHNSYl
2019-10-07 10:45:48 SERVER -> CLIENT: 235 Authentication succeeded
2019-10-07 10:45:48 CLIENT -> SERVER: MAIL FROM:
2019-10-07 10:45:48 SERVER -> CLIENT: 250 OK
2019-10-07 10:45:48 CLIENT -> SERVER: RCPT TO:
2019-10-07 10:45:48 SERVER -> CLIENT: 550-"Your IP:  : Your domain resortspa.com is not allowed
550 in header From"
2019-10-07 10:45:48 SMTP ERROR: RCPT TO command failed: 550-"Your IP:  : Your domain resortspa.com is not allowed
550 in header From"
2019-10-07 10:45:48 CLIENT -> SERVER: QUIT
2019-10-07 10:45:48 SERVER -> CLIENT: 221 host45.registrar-servers.com closing connection
2019-10-07 10:45:48 Connection: closed
2019-10-07 10:45:48 SMTP Error: The following recipients failed: [email protected]: "Your IP: : Your domain resortspa.com is not allowed

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