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As of now, MXtoolbox do not show any error while looking up rDNS of IP address 178.32.48.104. rDNS of IP address 178.32.48.104 is set to FQDN mail.simplyislam.biz. http://mxtoolbox.com/SuperTool.aspx?action=mx%3amail.simplyislam.biz&run=toolpage# Thanks,


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A CNAME record indicates that the name is an alias for another, for all record types. You are not allowed to have other record types for the same name when a CNAME is present. Remove the CNAME for @ and replace it with explicit records (A, AAAA, SRV, etc) for all the types you need.


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From what I'm reading, I need an MX record saying sendgrid is a valid sender. But today, sendgrid is able to send, without me doing any DNS change. No, it doesn't need to. Instead of MX record, you need SPF. MX record was used when handling incoming email i.e. guide the email intended to your domain so it get into your server. SPF was used when ...


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I found an answer from stackoverflow. http://stackoverflow.com/questions/17520514/sending-emails-from-my-domain-with-sendgrid First and foremost, the MX records for your domain are used only to specify the hostnames of the servers to handle INCOMING mail for your domain - i.e. the MX records have nothing to do with the servers that are used to send ...


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Reverse DNS does not match SMTP Banner The SMTP Banner is the response of your mail server for the ehlo query. Currently your mail server is closing the connection. That is the reason for the mismatch between rDNS and SMTP banner. Reverse DNS itself is set up correctly, though. # telnet mail.simplyislam.biz 25 Trying 178.32.48.104... Connected to ...


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Wildcard DNS RRs are not really a very good answer to any known problem, and they are an especially bad idea for MX records as it is often difficult or even impossible to correctly configure any mail server to work properly with them. Just be specific about exactly which domains you wish to use for email and configure the DNS and mail server(s) for them ...


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Disclaimer: this answer only use some postfix documentation in the internet, so perhaps I missed some facts here. For better and precise documentation, feel free to post the question in postfix mailing-list (Wietse Venema is active person in that list) or look in postfix source code. All above question is focused on postfix backoff algorithm. First, I'll ...


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Yes, the MX record for y.org can point to a DNS entry in x.org e.g. mail.x.org. You may also want to set up your SPF record What interface are you using to set up your DNS records? If it doesn't allow you to set up what you want it may be a limitation of your hosting company's interface.


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You've added the records for a subdomain @.example.com instead of just plain example.com. While the use of @ to represent the root is a common syntax in some DNS tools, it's not supported in Route53. Adding the records with an empty Name field will place the records on the root of the domain.


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Based on this log Apr 28 08:24:21 s18267928 postfix/cleanup[27044]: 3A2F9708C90E: milter-reject: END-OF-MESSAGE from surly.<domain.tld>[<ip addr>]: 5.7.1 Command rejected; from=<jon@othedomain.tld> to=<jon@maildomain.tld> proto=ESMTP helo=<surly.domain.tld> apparently the email rejected by Plesk milter that invoked by ...



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