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11

That would be highly inadvisable, or, to put it simply, just plain wrong. Just because the secondary server can connect to the primary doesn't mean one or more legitimate SMTP clients can connect to the primary. Multiple MX servers are primarily designed to handle routing and connectivity issues (and the weighting parameter is there to help hint at the ...


3

From the top layer perspective, Postfix relies on libc resolver to do DNS lookup (including RBL), so the the behaviour would depends on the library. For example, postfix will alwasy do lookup via NS server defined in /etc/resolv.conf. If the NS server has caching mechanism, then postfix will get the cache result too. This is also happen if your provider has ...


3

The problem here is that you configured your server so that it should relay any outbound email to a server, namely smtp.mandrillapp.com. That server, in turn, is not accepting to relay your mail. I don't know this company, but my guess is that they only relay mails from authenticated customers, and your are not logging-in. You should probably have ...


2

Removal of dynamic IP addresses from the Spamhaus blocklist is not desirable. The RFCs support such blocking, and these blocks allow a lot of spam to be blocked. Spamhaus documentation covers this blocking set. I commend your ISP on providing their dynamic IP addresses to Spamhaus and putting a block on their removal. Properly configured mail servers ...


2

You appear to have hit a long-standing issue in Android. In particular Android will only load the autodiscover XML over HTTPS. If you serve it over HTTP then Android will refuse to even attempt to use it. As described in the bug, Android does not use DNS SRV records to locate mail services.


2

You've got a PTR record mapping 162.254.149.186 to host2.sparkdojo.com, which is fine, But there's no A record for host2.sparkdojo.com, so the lookup the other way is not working. You need both of them to work.


2

I actually ended up getting an answer to this on my own - Outlook determines this from the Sender header rather than the mail-from header (which in our case didn't have the display name attached). We're going to be adjusting this internally.


2

In fact, the problem is simple: your JAMES server is running in an instance that's probably geographically far from where you usually are when you log in to your Gmail account, so it appears to Google like someone is trying to break into your account (after all, how can you be logging in from California and Virginia within a couple of hours of each other?). ...


2

Because of what you are trying to do I would suggest that you try hosting your email with a hosting provider and get your own domain so you can make any of those changes as require. Now as for your questions: Does using this fqdn is use-less in mail server setup? You Should use fqdn. How to verify that it is configured correctly? As stated by wtayyeb ...


2

Can anyone explain how this: https://www.ssllabs.com/ssltest/analyze.html?d=mail.luken-tech.pl&hideResults=on shows "Assessment failed: Unable to connect to server" SSLLabs only support HTTPS Testing. Your mail server speak with STARTTLS and SMTP protocol. The error message confirm the limitation Ports other than 443 not supported This ...


1

Well, I've performed a thorough diff and found these settings, which make Exim receive email: /etc/exim4/conf.d/main/01_exim4-config_listmacrosdefs: comment out or remove this block (lines 64-66): .ifdef MAIN_LOCAL_INTERFACES local_interfaces = MAIN_LOCAL_INTERFACES .endif and place this instead (note the dot between the address and the port, this is ...


1

In general it is not possible to easily determine why a particular message has been marked as spam by the Google Mail spam filters. Having said that however one item that is an easy test is to check whether admin@domain.com is in your recipients contact list. Contacts are far less likely to have their emails marked as spam. You should also review the bulk ...


1

Not really sure what you are asking for in #1. Are you asking if a PTR record is used in a mail server setup? Technically no it is not, but as a PTR record is used as the counterpoint for an A record, there are merits to having it properly configured (also, depending on other servers configurations regarding doing lookups to authenticate your server, it can ...


1

The error message from AOL seems to indicate that indeed your IP address was blocked. You could try to check using online databases such as senderbase if your IP has a listed reputation. Unfortunatly, it is the nature of banning that you cannot do much more to resolve it than to try to appeal to the relevant provider (in this case, AOL) and explain that ...


1

In the case you've described, the mails did not originate at your mail server, so they will not affect your mail server's reputation. The SPF record allows any mail server which is configured to check them to reject such messages or mark them as spam, but not all mail servers check SPF records, and some which do check them don't actually do anything with ...


1

Where are you defining the Mandrill API key? I think you are missing smtp_sasl_password_maps directive in main.cf. Please see the following: Can I configure Postfix to send through Mandrill?



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