blacklisted again anda again only on symantec

I do not need a solution (just sharing information)

Please help me i cannot find any problem this is a fresh server 

IP 51.38.53.28
no spam , spf + dkim , PTR

i also hire specialist IT it tolds me my server is ok 
no other blacklist block me only symantec
i go again and again in this blacklist
please help
i wrote a mail to investagation no1 reply me 
i am frustrated

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BLKIP1 Message When Signing Up for a ShareFile Account

Citrix reserves the right to block certain IP addresses from creating new ShareFile accounts in order to prevent spam. In some instances, ShareFile has blocked sign-ups from large regions due to excessive spam attacks.

If you are running into this message and need assistance with creating an account, please reach out to our Sales team here.

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Blacklisted from messagelabs.com

I need a solution

Hello,

My client is unable to send any emails to recipients that use the Messagelabs Filtering system.

We use Office 365 and they are coming back clean on all the spam blacklists I’ve tried, including Symantec’s.

The bounceback message we receive is:

550 5.0.350 Remote server returned an error -> 553 Message filtered. Refer to the Troubleshooting page at;http://www.symanteccloud.com/troubleshooting for more;information. (#5.7.1)

Please, could someone help remove us from this blacklist? It’s causing so much trouble for both my client and me! I don’t want to post the domain in this post, but if someone from Symantec needs it, please ask!

Thanks,

Ollie

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