

Invalid Recipient Address - Check if the email address(es) you are attempting to send the emails to is valid and if there are no spelling mistakes.The recipient can drop emails that are not according to the set policy. Email Violation Policy - Email service providers specify policies to ensure that emails must follow a particular set of criteria.Sender Flagged As Spam - Most email providers configure custom blocklists to drop potential spam users and domains this can mean that the email address or domain falls into a blocklist, and the recipient drops all emails.DMARC Record - DMARC records also help a recipient verify the authenticity of an email and its source some email servers may reject emails if they identify invalid DMARC records.Some email servers reject emails if the sender doesn't have DKIM configured. DKIM Record - DKIM records help a mail server verify whether a sender is legitimate.The policy set by the recipient may be blocking the emails from being accepted by the recipient. SPF Record - The recipient may have configured SPF (Sender Policy Framework) to drop unwanted spam domains.Bad DNS Records - The recipient's email server rejects emails due to issues that it may see in the email server's DMARC, SPF, and DKIM for validating the sender.Blocklisted IP Address - It indicates that the sender's IP Address might be within a blocklist this may be because the sender can get flagged for sending spam or bulk emails.

#HMAILSERVER INCORRECT GREETING SOFTWARE#
" One reason to change the welcome message is to make it harder for other people to determine what server software you are running." I never had it matching anything like the host it represents and never had consequences. I have long understood that the Welcome message doesnt matter and has no bearing on reputation (and it is only MXToolbox that 'suggests' they should meaningful to matching dns records). SMTP Welcome message: "10.10.10.10. ESMTP"ġ: SMTP Welcome message must match A and PTR records = FCrDNSĢ: SMTP Local hostname = EHLO greeting must match hostname in MX record for domainģ: SPF record must cover server for domain "mydomain.tld"Ĥ: DKIM record must match email signature for "mydomain.tld"ĥ: DMARC must have positive SPF result and positive DKIM result. My PTR does not match my hostname nor my domain and still I check all the boxes. I know the project isn't active, but that would be ideal. I would think if HMailServer already has a rule of binding to an IP address that it should be possible to add a feature to use a different local host name depending on the header. I thought a best practice would be to do a local host name to match our reverse DNS. We already have 2 servers that don't have issues anymore because they have been running for over three months. These are fresh IP addresses which need to get good reputation.
