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not receiving mails to a mail id

ajaym4a
i can't receive mail to a particular mail id, the log shows like this SMTP error from remote mail server after RCPT TO:: 450 4.7.1 : Helo command rejected: Host not found these both mail ids are unknown, how can i resolve this. actually there was an attack towards this mail id and i changed the password to a strong one.

Comments

15 comments

Date Votes
  • cPRex Jurassic Moderator
    Hey there! Is this address one that you are trying to send to, or one that is on your local machine? If this is a local address that can't receive email from a particular sender, this could be caused by the "Require RFC-compliant HELO" option in WHM >> Exim Configuration Manager. However, the issue would be with the sender of the message not following correct email standards. If this happens when you send a message to a remote address, but sending to other addresses works well, it sounds like an issue with the HELO verification on the remote server. Could you clarify if the problem is with receiving a message locally or when sending a message to an external address?
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  • ajaym4a
    Thanks for the reply, the issue was the ptr record was not correct. I just update the PTR from server provider side. and also there is an forward email in email filers option, i removed that too.
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  • ajaym4a
    my current issue was, I cant send mails to gmail from my domain. but i can send to other providers, i believe gmail blacklist my domain/IP. the log was like this, ECDHE-ECDSA-AES128-GCM-SHA256:128 CV=yes: SMTP error from remote mail server after end of data: 550-5.7.1 [36.255.3.22 19] Our system has detected that this message is\n550-5.7.1 likely suspicious due to the very low reputation of the sending\n550-5.7.1 domain. To best protect our users from spam, the message has been\n550-5.7.1 blocked. Please visit\n550 5.7.1 Why has Gmail blocked my messages? - Gmail Help for more information. a13-20020a170902eccd00b00153be60734fsi25383254plh.363 - gsmtp is there any solution for this. Please reply me as soon as possible if any, thank you.
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  • Spirogg
    my current issue was, I cant send mails to gmail from my domain. but i can send to other providers, i believe gmail blacklist my domain/IP. the log was like this, ECDHE-ECDSA-AES128-GCM-SHA256:128 CV=yes: SMTP error from remote mail server after end of data: 550-5.7.1 [36.255.3.22 19] Our system has detected that this message is\n550-5.7.1 likely suspicious due to the very low reputation of the sending\n550-5.7.1 domain. To best protect our users from spam, the message has been\n550-5.7.1 blocked. Please visit\n550 5.7.1
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  • Spirogg
    also there is an forward email in email filers option, i removed that too.

    was that forward email your email address did you add that ?
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  • ajaym4a
    was that forward email your email address did you add that ?

    no, still dont know how that added.
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  • ajaym4a
    have you tried again to send an email to your Gmail email after fixing the reverse dns PTR. I have received message before as well, but after 1/2 hour or so I was able to send. also check your spam folder. if you see any emails in spam folder in Gmail from your server make sure to not delete them - Just click its not spam so Gmail knows this server is not sending spam to your account.

    there is no messages in spam, i checked. its rejecting while hitting google servers.
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  • cPRex Jurassic Moderator
    Your best option will be to use the Gmail link in that bounceback message to see why they are blocking your IP address.
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  • ajaym4a
    Your best option will be to use the Gmail link in that bounceback message to see why they are blocking your IP address.

    nothing helpful in the gmail link.
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  • cPRex Jurassic Moderator
    While there may not be anything directly helpful, the error indicates the problem is specifically with Gmail blocking your IP address. You'll need to contact Gmail to have them take care of that.
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  • akhand
    While there may not be anything directly helpful, the error indicates the problem is specifically with Gmail blocking your IP address. You'll need to contact Gmail to have them take care of that.

    hi sir i got i problem how i setup PTR in 2022 New Update
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  • cPRex Jurassic Moderator
    @akhand - usually the PTR records are handled by your hosting provider, so you'd want to contact them. You can find more details on that here:
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  • akhand
    @akhand - usually the PTR records are handled by your hosting provider, so you'd want to contact them. You can find more details on that here:
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  • akhand
    @akhand - usually the PTR records are handled by your hosting provider, so you'd want to contact them. You can find more details on that here: is gve 404 error
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  • cPRex Jurassic Moderator
    I also am not able to see that page - here is the correct link: How to Configure Reverse DNS in WHM | cPanel & WHM Documentation However, it's important to realize this likely will not work. Unless your server has been granted the authority to host its own reverse DNS, which is rare and usually only happens if someone purchases a large block of IP addresses, you'll want to contact your hosting provider to have them set that up.
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