Refers to the hardware or software that make up a server dedicated to sending and receiving emails. Many popular modern email servers bundle other functionality for contacts and calendaring along email delivery.

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0answers
20 views

Originating (non-critical) emails from a “less-trusted” host

Background We have a webapp running on webapp.example.com that (amongst other things) sends messages by email from time to time. These messages are non-critical: whilst we would like to make a best ...
0
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0answers
29 views

How can I spam-filter outgoing email on a postfix server?

I'm in the process of setting up a solid mail system. It's my second time setting up something like this, so I already have a basic understanding of how to approach certain topics. I'm using postfix ...
-4
votes
1answer
32 views

DNS MX Record resolves fine from my servers, but is not cached/returned? [on hold]

So, my DNS server is returning the MX records just fine: DNS: avuna.org for type# 15 returned 0000046D61696C056176756E61036F7267 Has the proper records: mail.avuna.org A 198.167.143.175 ...
5
votes
2answers
46 views

What to do if one doesn't want to receive email bounces?

Background—the standards RFC 5321 §4.5.5 states: All other types of messages (i.e., any message which is not required by a Standards-Track RFC to have a null reverse-path) SHOULD be sent with ...
-1
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0answers
37 views

How to check email delivery in server? [on hold]

I currently have a server with CentOS that runs Cpanel from hostgator. I have another server to send email to using php scripts. This email reaches gmail server safely, but it doesn't reach my ...
1
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1answer
22 views

Benign Email Headers

On our server, we have two separate email systems: if it's a long queue of recipients, then we store it in a queue to be sent in a cron. If it's less than X number of recipients, then it sends ...
0
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0answers
23 views

Postfix relay smtp to 2 relayhosts for same domain [duplicate]

have a setup in which Postfix relays mail for a specific domain to another mail server (Exchange) via the usual transport file: # /etc/postfix/main.cf transport_maps = hash:/etc/postfix/transport # ...
0
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0answers
14 views

hMailServer --> find all bounced back emails

I've been assigned to clean up some of our obsolete client's email from database. So the process was to send all client an email and see which one bounces back. now the problem is I can't find where ...
0
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0answers
13 views

How can I detect mail servername used from my clients to my server?

I have a web and mail server with Ubuntu 10.04, Apache 2, courier, postfix, Ispconfig 3 and multiple sites hosted. The clients use mail from Outlook with a config like this: @domain1.com use pop and ...
0
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0answers
11 views

rackspace e-mail server to Office 365 Exchange [closed]

I am going to change my rackspace e-mail server to Office 365 Exchange server What are the things I need to take carre while changing this. I am using PHP application for sending emails, do I need to ...
0
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1answer
24 views

Possible to setup a secondary email server with unique addresses?

It is possible to setup two email gateways such that if a record doesn't match the first server then it attempts a second server before failing to deliver? Background: Client recently switched from ...
0
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1answer
37 views

How to change Zimbra Welcome page

I have configured a zimbra mail server. It is working fine. But I want to make one of my own html page as welcome file before login page. I have tried to edit the web.xml file but it is of no use. ...
3
votes
1answer
59 views
+50

Configure exim4 to use Microsoft Exchange as smarthost

My company has set recently set up an Active Directory driven Microsoft Exchange environment to consolidate outgoing mails. We do have a set of staging servers which should now use our MSEXCHG as ...
0
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0answers
13 views

Prevent Hmail from relaying spam

I am running hmail and it is sending a lot of spam without my knowledge and without me making it send anything. This is highly frustrating. What must I configure in Hmail to prevent it from ...
1
vote
1answer
185 views

Changing hosts resulting in 554 5.7.1 <xxx@domain.tld>: Relay access denied

I have a problem with switching my project from hoster A to hoster B. There are three parties involed: the old hoster, the new hoster and NetworkSolutions as a registrar. I have a .com and and a ...
0
votes
1answer
24 views

How to set up separate relay for sendmail outgoing mail to foreign domains

I have FreeBSD 10.1 and sendmail 8.14.9. Assume my host is "myhost.mydomain.com" and I want: All mail destined for hosts in "mydomain.com" to go to "mail.mydomain.com" while appearing to originate ...
1
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2answers
132 views

Can't communicate with SMTP server from particular machine

Here is the situation: When I run the following on my local machine, the mail server responds: $ telnet mail.server.com 2525 Trying <mail.server.com IP>... Connected to mail.server.com. ...
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votes
1answer
31 views

How would get an email server reputation via cli or script?

I am trying to monitor email server reputation via cli or script i.e. https://www.senderbase.org/ I found a way supposedly to do it via dig, but the output appears to be very incorrect. It indicates ...
-4
votes
1answer
67 views

How to enable `dbox` for a particual mail account?

I need to enable http://wiki2.dovecot.org/MailboxFormat/dbox/ formailarchive account. I want to enable dbox only for the mailarchive account & the other accounts continue to use the Maildir ...
2
votes
1answer
33 views

Authentication error connecting to a mail server via openssl in the terminal

I've set up an email server using Postfix and Dovecot and I'm able to send and receive mail using various mail clients but for some reason I get an authentication error when I try to connect via ...
0
votes
1answer
23 views

Lotus Notes subdomain exchange server

We have a notes server at notesserv01.intra.contoso.com that processes our regular email, and an exchange server at exchserv01.intra.contoso.com for testing purposes. Lotus Notes email addresses are ...
1
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0answers
63 views

Postfix on server with multiple IP addresses sends mails with wrong HELO in header

I have a VPS with multiple IP addresses: venet0:0 x.x.x.2 venet0:1 x.x.x.3 venet0:2 x.x.x.4 venet0:3 x.x.x.5 All IPs have A records m2.domain.com -> x.x.x.2 m3.domain.com -> x.x.x.3 ...
0
votes
2answers
51 views

Postfix Failed to Receive Email

I am trying to set up a mailing server with postfix and dovecot in ubuntu 12.04 following this guide. All seems to have worked out correctly and when I try this echo test | mail email1@example.org ...
0
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0answers
17 views

Disable mailboxes on Exchange 2007 while emails are being redirected to Gmail

I am trying to uninstall Exchange 2007 for a client as they have decided to use Gmail from now on. I have been going through some errors like the transport connector and the watermark and now I am ...
2
votes
2answers
34 views

How to move cur tmp new directories directly in virtual user home?

Reading the Maildir documentation they just mention folder should be like user/Maildir/cur tmp new So my virtual users have it without Maildir folder like: ...
1
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1answer
54 views

Can existing email accounts be extracted from Zimbra?

I have become dependent on Zimbra, and yet I have no need for a heavy GUI administrative interface. I'd rather keep a low-resource server that runs only the underlying services Zimbra uses, such as ...
-3
votes
0answers
31 views

What is the definition of an SPF SoftFail? [duplicate]

1) In a "How To" I see: "~ tilde signifies a SoftFail should be issued". I don't get it. a) Who should issue the "SoftFail"? b) Who should receive the thing issued? c) What exactly is being ...
0
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0answers
4 views

Should SpamAssassin tests/rules differ between implementations? [migrated]

Disclaimer — I have no experience installing or maintaining servers of any sort. I'm asking here as my webhost isn't giving straight answers and am hoping to find some clarity. I'm having an issue ...
1
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1answer
27 views

Forward Exchange 2013 email to a different mailbox server

Alright, I've seen a few of these posted, but nothing that really jumps out and seems like its' going to do what we need. We have been using a cloud hosted exchange 2013 system for about 8 months ...
-2
votes
1answer
38 views

Could nginx mail module replace a Postfix/Dovecot combo

I saw that nginx has a "Mail Module". I googled but don't find much documentation about this. What is this ? For what can it be used ? Could it replace my current simple Postfix/Dovecot combo?
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votes
1answer
54 views

how to prevent fake mails from being sent on my mail server? [closed]

I use Zimbra as my office email server. Recently, an intern at my company showed that he could use my email id (without hacking into my account) to send emails to anyone in the company using the ...
0
votes
1answer
105 views

Postfix milter-reject: END-OF-MESSAGE from 4.7.1 Service unavailable - try again later

I am running postfix-2.11 version and recently i have added dkim-milter-2.8 Postfix configuration: # DKIM milter_default_action = accept smtpd_milters = inet:localhost:8892 non_smtpd_milters = ...
0
votes
1answer
94 views

Relay Denied SMTP error from remote mail server after RCPT TO: <email@example.com>

Hi I have a problem when I want to send mail using smarthost method in exim and usage Mailgun as SMTP server for relay. this is my configuration dc_eximconfig_configtype='smarthost' ...
-1
votes
1answer
36 views

Understanding Postfix Mail Log (Part II)

There are several logs like below in my Postfix mail log: Mar 9 06:01:10 postfix/smtpd[23043]: initializing the server-side TLS engine Mar 9 06:01:10 postfix/smtpd[23043]: connect from ...
0
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1answer
50 views

Relay denied (454) [closed]

I make test with the website mxtoolbox.com with my smtp and received this error: 220 hostname.example.com ESMTP [702 ms] EHLO MXTB-PWS3.mxtoolbox.com 250-mail.example.com 250-PIPELINING 250-SIZE ...
-1
votes
2answers
69 views

Internal SMTP server no longer delivering to Google Mail

Our corporate email is hosted on Google Apps, along with 5 domains for various products. Internally (Behind our firewall, not exposed to the internet) we have an IIS server running Microsoft ESMTP ...
2
votes
1answer
30 views

Catch incoming email and then deliver to original recipient on sendmail

in the company I work for there are a user that is making bad use of the email, but to have evidence of what he is doing we need to intercept all the incoming email to him and all outgoing email from ...
0
votes
0answers
20 views

Exim 4.72 doesn't verify recipient

I have a problem with recipient verification. I have next configuration for acl_check_rcpt: accept hosts = : deny message = "Invalid characters in the address" domains = ...
3
votes
0answers
29 views

Dovecot and virtual domains with different namespaces

I've got dovecot 2.1.7 setup with virtual domains and now would like to have different public namespaces for each of the virtual domains. E.g. workdomain.com -> INBOX (private namespace) -> ...
0
votes
0answers
20 views

Is “Received: from hostname (localhost [127.0.0.1])” triggering spam filters? [duplicate]

I am running my own postfix Mail Server. All my mails are Spam filtered (at least by Gmail and Yahoo). I don't really know why they are filtered, because I have implemented SPF, DKIM and DMARC. ...
2
votes
1answer
44 views

SMTP DNS Validation with multiple mail servers behind multiple Public IPs

I know when a Mail server receives an e-mail, it performs a "DNS 3 way check" (I think this is also sometimes called FCrDNS) as a simply test against spammers. The way I understand it to work is as ...
1
vote
1answer
32 views

helo message set to local hostname

I have a droplet on DigitalOcean and decided to implement my own mail server there using postfix and dovecot. Everything worked correctly and I was able to send and receive emails via a mail client ...
1
vote
0answers
62 views

Hotmail SMTP cache?

So this is an odd one ... Does Hotmail in anyway resolve and cache information for MX records or A records for individual email addresses? For Example: I setup a personal test bed mail server and ...
0
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0answers
18 views

outlook doing remote portscanning

A while ago I switched my mailbox on another domain and configured outlook with an exchange server on that domain. Recently for some strange reason my hosting provider has been complaining that ...
0
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0answers
11 views

Starting qmail-toaster: svscansvscan: warning: unable to read directory: access denied

I got such message when trying to start qmail-toaster: Starting qmail-toaster: svscansvscan: warning: unable to read directory: access denied All permissions are correct. drwxr-sr-x. 2 alias ...
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votes
2answers
53 views

Emails from my domain getting blocked at all other domains [duplicate]

Recently I tried to set up a new email server using iRedMail on Lubuntu. The mail server workes very well when email conversation is in the same domain. But when a user tries to send email to some ...
4
votes
2answers
115 views

Parse undelivered mail headers (bounced mail)

What is the best way to parse the headers of bounced (undeliverable) email that is sent back to my server and determine whether it is a soft or hard bounce? I only send opt-in emails to my users, but ...
0
votes
2answers
144 views

email sending speed - how to improve

I am maintaining a server to send email mailings (no spam, of course). The current speed of this machine is approx. 2000 emails per hour. (edit: actually I did a test mailing today, removing the ...
4
votes
1answer
144 views

how do I set up two smtp ports for postfix?

A CentOS 7 server with postfix, dovecot, and mailx needs to accommodate mail being sent through port 465 and received through port 25. What specific syntax and files need to be changed in order to ...
0
votes
1answer
45 views

How does the DKIM from SendGrid prevent me from spoofing my email adress?

I'm making use of SendGrid to send automatic emails. First I went to the whole hassle of creating a DKIM record, before I recently discovered the whole record doesn't seem to be checked anyway, ...