1 Server, 2 IP's, 5 Domains - external DNS provider | SMTP Reverse DNS Mismatch

[OrinocoDelta]

Hello - i do not come forward and i tried everything that i found at Google... Maybe one of you or Parallels team can help me. Thank you so much!

Scenario:

1 Server - 2 IP's (shared: ###.###.###.001 and dedicated: ###.###.###.002)
5 Domains (domain1.tld, domain2.tld, domain3.tld, domain4.tld, domain5.tld)

What i have done so far:
a) i changed the hostname to xyz.myhostname.tld, i also set the reverse dns in starto config area to point to my hostname, also a entry at my dns provider is done. I changed the hostname in Plesk panel

b) domain5.tld is set to my dedicated IP, ###.###.###.002
all other domains are set to shared IP

c) in Plesk panel under Server-Wide Mail Settings i have set: Send from domain IP addresses and use domain names in SMTP greeting

Everything seems to work correct, but if i check domain5.tld (Dedicated IP) mxtoolboox.com i get this error:

"SMTP Reverse DNS Mismatch, Warning - Reverse DNS does not match SMTP Banner"
"SMTP Banner Check, OK - dedicated IP resolves to domain5.tld"

Connecting to ###.###.###.002

220 xyz.myhostname.tld ESMTP Postfix (Ubuntu) [780 ms]
EHLO MXTB-PWS3.mxtoolbox.com
250-xyz.myhostname.tld
250-PIPELINING
250-SIZE 102400000
250-ETRN
250-STARTTLS
250-AUTH DIGEST-MD5 CRAM-MD5 PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN [780 ms]
MAIL FROM: <supertool@mxtoolbox.com>
250 2.1.0 Ok [780 ms]
RCPT TO: <test@example.com>
454 4.7.1 <test@example.com>: Relay access denied [780 ms]

MXTB-PWS3v2 4430ms

What i miss here and what i have to do?

One good thing happen, before (domain5.tld) was hosted by shared IP and all send E-Mails are marked as spam from Google. Now - send E-Mails are not marked as spam!

Any suggestion, any ways i can try and follow?

 

[pleskpanel]

Just to double check that your provider properly updated the PTR record (they would have had to add two, one for your primary domain xyz.myhostname.tld on ###.###.###.001, and one for domain5.tld on ###.###.###.002), have you pinged your ###.###.###.002 IP address to see what it resolves to?

For instance in a command prompt:

ping -a ###.###.###.002

should include your domain5.tld value in the response.