I cant send email to specific domain, 554 5.7.1 Spam message rejected (in reply to end of DATA command))

[fego91]

Hi every body.
I have a problem when i try send email to specific domain, in the log i see this

to=<henrique.bernardes@ciber.com.br>, relay=mx01.wirtgen-group.com[93.122.82.33]:25, delay=3.3, delays=0.05/0/2.2/1, dsn=5.7.1, status=bounced (host mx01.wirtgen-group.com[93.122.82.33] said: 554 5.7.1 Spam message rejected (in reply to end of DATA command))

Anyone can help me please?

 

[BobhWasatch]

The other server is rejecting your email. You might have ended up on one of the various DNS block lists. I had that happen once because someone else in the same IP block at my hosting provider was spamming.

You need to find out which lists you are on and how to get removed. Here is a site that checks several such lists:

https://www.dnsbl.info

ETA: Posting in the Mail Gateway group might get you more help.

 

[Ramalama]

Mailserver:
- Do you have a static ip? Dynamic = spam
- ptr record of the ip should point to the mailserver (mx.yourdomain.com). If it doesn't, chances are high that you land on spamlists.
- spf, optional, but decreases chances to land on spamlists
- mailserver should send over smtps with a trusted certificate (letsencrypt does it)
- don't send html mails, only plain text if possible.
- dkim, optional, good to have, not necessary
- dnssec, optional, not neccessary

Check if your mailserver is on any blacklists and remove it.
You can get an subscription from uribl (costs around 900usd/year), additional to their subscribers antispam list, that you can add to postfix blacklists, they won't block your mailserver ip. (They are the biggest and every other blacklist basically check against them)
I hate uribl for that xD

However, the first 2 points are the most important ones.
This whole reply is based on importance, the first things are most important.

Cheers

 

[alexandrek]

Good morning everyone, how are you?
I have this problem, but on my internal server, below is a log.
If anyone knows what I need to do to solve it,
Thank you.

---------------------------------------------------------------------------------
This is the mail system at host antispam.grupojs.com.br.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<**********>: host **********[**********] said: 554 5.7.1
Spam message rejected (in reply to end of DATA command)

 

[leesteken]

Spam message rejected (in reply to end of DATA command)

Contact them and do whatever they want you to do to get them to accept your mail from your IP. This is not related to Proxmox VE at all.

Please note that the e-mail address is still readable because you did not change the link target (hover over it with the mouse cursor or click it).

EDIT: The post right above yours also give good hints