For mail server admins, do you enforce PTR (reverse dns checks) on incoming mail? All hosts know to have rDNS set on their mail IPs to ensure free-flowing outbound mail but do you also enforce the check on inbound.
And does anyone know of somewhere that shows stats on the state of net and what perecentage use PTR checks etc?
I have several servers on a network that I need to determine if the IPs are pinging to our servers, or someone else's servers on the same network. I have about 300 IPs to check. I'm hoping there is a way to do this by confirming the MAC address it's pinging to? Or is there a script anyone is aware of that would help automate this?
Just trying to do some IP cleanup on a network where IPs were not allocated properly.
I am not expert in linux box.... Actually I have found a problem in my machine, our clients are not able to access their sites from server, when I checked the system log it was related to Permission Denied. Someone told me to disable SELinux enforcing, Now after that my problem resolved.
But I am curious that what exactly Selinux is and what kind of issue it may create for my box if I disable it?
would run(I guess best way is via cron) that checks the load of my VPS and records it in some log....
View 9 Replies View RelatedWe send mail to another servers but we cant recieve mails another servers. We can't recieve with webmail and outlook.
I look logs but there is no error and our ip is not in blacklist.
there is the error in our server
[url]
linux cpanel centos 4.6
i enter my ip in dnsstuff.com for see spam my mail
because if i send one e-mail of my server to gmail go to spam
[url]
PTR MISSING! 111.1.1.1.1.1 has no reverse DNS entry; some mail servers may not accept your mail. 86400 seconds 0 ms
What means?
means my ip server is in blac list?
I have configured my yahoo domain to use Leaseweb shared Linux hosting by changing my A records to my hosting IP. When I check my yahoo domain control panel I see,
Type: >>>>>>>>>>>>> Source: >>>>>>>>>>>>> Destination:
CNAME Record>>>>>>>>>>>>>mail.mydomain.com>>>>>>>>>>>Yahoo! Hostname
Problem
All my email addresses that I created from Leaseweb plesk control panel can not receive any emails (test emails bounce back with a failure notice)
I think I have to change the above CNAME record in yahoo domain control panel to leaseweb mail servers.
how to go about switching mail servers.
mail.domain.com is used as the MX record and is where users point their mail clients for POP/IMAP access. I'm obviously going to be relocating the record to a new IP.
My questions are:
In the interim period, can I have exim 'redirect' POP/IMAP connections to the new IP (for users), and can I have exim relay/forward (not sure on the term in this case) mail received from old DNS caches to the new mailserver IP?
I have 2 servers 1 US and 1 UK.
What I wanna do is synchronize both of them using rsync. Once they've got synchronized, the UK will be the primary server and US will be secondary, in case the UK goes down.
my questions are
1. Is it possible that when the UK goes down, the A records for domain.com automatically switches to the US server so it can take over while UK is down.
ie. UK ip 112.113.114.1
US ip 222.111.444.5
domain.com A records = UK ip when up... but when UK is down, A records automatically changes to US ip.
2. And when the UK server goes up again, whatever changes made to US server will be pushed to UK. May it be files, accounts or e-mails.
I.E.
UK and US are synchronized every 30mins. UK and US both have e-mails 1-10.
Just before the sync time, UK server received an e-mail 11-15 then goes down. So the US Server will take over but do not have 11-15 mails, since it was received before sync time. During the UK downtime, US server received e-mails 16-20.
When the UK server goes up, will it be possible to sync both servers that both of them will have the e-mails 1-20?
I hope you get my point...
If these are not feasible, what can you advice as an alternative solution. All I want is to avoid downtimes, especially with mails as the business relies on this.
I am moving a couple clients over to my server tonight, but I wanted to make sure I took steps that they don't miss any e-mail that might be sent. It is my understanding that say the switch happens tonight at midnight. Any e-mails they did not download from the old server will be stuck on there correct? Because they would come in the next morning and hit outlook and download just from the new server?
Is there a set protocol for doing this move with minimal client hic-ups?
i'm running a forum and a few other things on a futurehosting VPS plan which is running centos.
we changed to futurehosting because our shared hosting was definately not coping with it, so we had to make a quick changeover... unfortunately i dont have too much experience with setting up mailservers in linux(which seems to be a massive complicated mess involving a million different services).
i'm wondering if anyone knows any guides to setting up a mail server + have a managable web interface to add user accounts/setup forwarding rules and such that works well with centos?
or better yet, is futurehosting capable of doing it for me
I have a virtual dedicated server with GoDaddy. I don't know to much about managing a server, but have been doing ok for the last 5 months or so (so please make any explainations VERY simple)
I run several pretty heavy traffic sites, and the scripts on the sites send out automatic notifications to the user base that has requested such notifications (new responses, new listings etc..) and in the past few days NONE of those emails are making it through.
The mail just DISAPPEARS! I'm not getting any bounced email, the mail queue manager has only the same spam as not being allowed through, and I have restarted exim, GoDaddy also says that mail IS being sent from the server, they just can't explain why it isn't being delivered, and I'm not going over the max amount I can send daily.
I have NO clue what is going on and ANY help is REALLY appreciated!
Also, the forwarders are still working (mail sent to user@domain.com still gets successfully forwarded to the correct email address)
I don't know much about technical details of mail servers. But i want to discuss a serious problem i am facing now. I have a reseller account with jodohost. I am not a reseller but i need this to host 20 of my own and client sites. During last few days no. of emails coming to us dropped almost 60% and suddenly i found that i was not getting emails from few of my clients. Then today i got a call from two of them and they said that all emails they were sending to me, were bouncing back.I asked them for a copy of bounced emails which they sent to my gmail account and i forwarded it to my jodohost support. This the response i got-
All of our mail servers have reverse DNS and mails are delivered. anyone not having rDNS is not able to mail much of the internet already, they really must talk to their system administrators and get reverse DNS setup.
Now they say that my clients do not have rdns at their mail servers and emails from them can not be delivered to my account.
Is rdns compulsory to send emails from a mail server these days?
But in that case i may not get emails from so many inquires?
I have a couple cpanel servers and am interested in setting up new server (without cpanel) that I would use as a mail server for all the other cpanel servers. This server would also interface with my mailfoundry anti-spam solution. Can someone point me to any tutorials/how-tos for setting up a standalone mail server that still works with email account creation, etc, aspects of cpanel?
View 9 Replies View RelatedI'm trying to see if it's possible to have 2 email addresses on the same domain (e.g. email1@domain.com and email2@domain.com) but are handled by 2 different email servers (e.g. mail.domain1.com and mail.domain2.com)?
To put it into context, I have a domain hosted on my dedicated server and a couple of email accounts set up on it. I also have another mail account set up on a different server but with the same domain. I was wondering if maybe something could be done with the DNS to allow the 'external' mail account to be handled by the other server?
The thing is that the emails that are going to gmail servers are getting stucked on my mail queue, here is the log of one mail in exim:
Message 1KyWoL-0004jv-FS is no longer frozen
LOG: MAIN
cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -M 1KyWoL-0004jv-FS
delivering 1KyWoL-0004jv-FS
Connecting to gmail-smtp-in.l.google.com [74.125.45.27]:25 ... connected
SMTP<< 220 mx.google.com ESMTP 34si8790560yxm.0
SMTP>> EHLO srv211.xxx.cl
SMTP<< 250-mx.google.com at your service, [64.76.xxx.xxx]
250-SIZE 35651584
250-8BITMIME
250 ENHANCEDSTATUSCODES
SMTP>> MAIL FROM:<consultas@xxxx.cl> SIZE=1957264
SMTP<< 250 2.1.0 OK 34si8790560yxm.0
SMTP>> RCPT TO:<xxxxx@gmail.com>
SMTP<< 250 2.1.5 OK 34si8790560yxm.0
SMTP>> DATA
SMTP<< 354 Go ahead 34si8790560yxm.0
SMTP>> writing message and terminating "."
LOG: MAIN
== xxxx@gmail.com R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000e: terminated by signal 14
LOG: MAIN
Frozen
It happens on all my servers (i have 4) and i don't know if the problem is mine, gmail's or even my datacenter
I have all my services running, (though i restarted exim anyway)
I just switch to a new server and I found out that hotmails is marking all my mail as spam, it goes directly to the junk mail folder, however gmail and yahoo is ok.
I have a broken reverse dns thought that my be but I'm not sure, anyone have any experience regarding this?