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Questions tagged [email]

The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.

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1k views

Office 365, blocking emails with HTML attachment internaly

We had a few attacks in organization where user credentials was stolen and was used to send emails from compromised account to rest of the organization with malicious HTML attachment. Is it possible ...
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1answer
1k views

Exchange Server replaced but Outlook still trying to connect to old Exchange Server installation

My clients are running Windows 7 x64 and Outlook 2010. My servers are running Windows Server 2012 R2 in addition to Exchange Server 2013 CU15. I had some major problems with my Exchange 2013 ...
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0answers
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Spamassasin rule to flag certain MX IPs

I've noticed a flood of spam that is related to the same range of IPs. All the spam email has different HTML text (which is english but meaningless) and a few embedded pictures (which I block) but ...
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1answer
30 views

Is there a way to use two separate mail hostname to send and recieve? [on hold]

I'm dealing with my own email server and i'm not allow to send emails out my same network, i mean, i can't send emails to gmail, hotmail, etc. So, i was trying to find some way to use an external ...
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0answers
9 views

Send Again email with Postfix using email ID

Send an email again to the same destination and with the same content using Postfix email ID, is It possible? I have this log of an email which has already been sent and I want to send again: Nov ...
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1answer
17 views

sending test emails from posftix fails

I am trying to setup posftix to send email through internal exchange server. my main.cf # See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: ...
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1answer
16 views

Working Postfix with NO CHANGES kept receiving mail but when sending got 'mail for <domain> loops back to myself'

I had this classic error message for which I found DOZENS of pre-existing asked-and-answered questions scattered here and throughout the internet. However, they were not my situation. In every one of ...
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3answers
186 views

Forcing Dovecot 2.3.4.1 to use TLSv1.2

Since the new Debian Buster update, I have some issue with TLSv1.3. Issue: my iOS mail client could not connect to my mail server (12.2) and I do not want to upgrade right now, so I try to find a way ...
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0answers
19 views

Are email services looking at the “From address” along with the envelope sender when doing SPF lookups?

First, I understand the caveats and flaws of SPF as an aging authentication technology, and understand that it should be used in conjunction with DKIM and DMARC and is not a panacea for deliverability....
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1answer
133 views

Recovering deleted plain text (emails) files from raw disk image

I'm hosting my own linux mail server for my family. Yesterday my father lost all the mails in his Inbox folder. I'm still not sure whether it's due to a terrible user error or compromised password, ...
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3answers
419 views

How does yum-cron send emails from localhost?

I have an amazon linux 2 server running in the aws cloud and I have yum-cron running on it. I have an email domain mydomain.com which is running on a separate server in a completely different cloud ...
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2answers
1k views

Fail2ban not respecting email settings

In Fail2ban I have set up my email settings as: # Destination email address used solely for the interpolations in # jail.{conf,local} configuration files. destemail = me@hotmail.com # # Name of the ...
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1answer
23 views

Lotus Domino mail routing and separation

Mail Separation – Goal is to allow mail separation between different OUs while minimizing the number of servers required. a) Users of the same OU can email back and forth. b) Member of different OUs ...
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1answer
18 views

How can I get msmtp to send system messages to my email?

I used to use ssmtp on Debian Stretch. Whenever there are system emails, they would get sent to my admin email. It was quite good because I would get a report on all my servers. This was true until in ...
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4answers
9k views

dovecot start “Address already in use” error

I'm currently trying to use some "me@mydomain.com" adresses on my dedicated server (Centos5). To do so, I'm tring to launch dovecot with /etc/init.d/dovecot start, but I get the following error ...
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1answer
1k views

Excessive delay or not delivery for Yahoo emails to Exchange mailboxes

Emails with attachments from Yahoo mail not deliver to our exchange mailboxes or receive with to much delay.The bigger the attachment the later delivery.Emails with 10MB attachments not deliver at all ...
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0answers
15 views

Can't send emails externally from Postfix, except to Gmail accounts [closed]

I am attempting to run an email server from my house (for fun, and to see if I can stop replying on Gmail) on a CentOS 7 machine. I used iRedMail to do most of the heavy lifting configuration-wise. I ...
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1answer
23 views

550 2607:f8b0:4864:20::132 is not allowed to send mail from [duplicate]

When I try to send an email I get the following error: 550 2607:f8b0:4864:20::132 is not allowed to send mail from mydomain.com. Please see the SPF record, with scope mfrom, identity myuser@...
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0answers
15 views

Postfix sending mails with logs

We've been receiving mails to our domain from one of our Debian VM's with weird log files, as example today I received the content of /var/log/messages.733.xz , obviously the content are weird ...
6
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5answers
30k views

How do I get my server off the ivmSIP/24 blacklist?

I checked my server IP using this tool: http://www.mxtoolbox.com/SuperTool.aspx It's come up on the ivmSIP/24 list. What can I do to get my IP removed from this list? I have SPF records set to ...
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0answers
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monitoring : email delivery and deliverability (postfix) [closed]

I use a mix of Zabbix & Nagios to do various checks : JMRP, SNDS, multi-RBLs and heaps of Postfix checks to monitor mails servers with over 100k mailboxes from +20K domains. As you imagine, it is ...
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0answers
35 views

how can I pipe messages from postfix to python

I have already read this topic (How to configure postfix to pipe all incoming email to a script?) I still don't understand how can I pipe messages from postfix to python script. I need only to pipe ...
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1answer
28 views

msmtp and OVH mail

I'd like to send a mail when a user authenticates on a Debian 9 server. I use OVH mail server. I've set up msmtp like so : account myaccount tls_starttls off logfile ~/.msmtp.log host ssl0.ovh.net ...
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1answer
1k views

Help debugging Sendmail/Mailman configuration issue

I'm trying to configure a server with Sendmail and Mailman. I've been getting "Broken pipe" errors for a while, and have slowly been debugging. I fixed some permission issues, and changed the user ...
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2answers
1k views

How to configure sendmail to only send to specified domains?

I have a local development server (centos) which I develop a number of websites on. Occasionally I need to test email sending scripts. I want to avoid the development server from sending emails to ...
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1answer
1k views

connecting exim4 to openldap on remote server

I have a server running qmail with about 300 user accounts on a ubuntu version 8 server. I would like to migrate qmail to a new mta such as exim4.x. I have a VM setup using redhat enterprise version 6 ...
0
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1answer
956 views

What is the maximum message size that SendMail can successfully receive and where would the bottlenecks be?

CentOS 5.x | SendMail 8.14 I'm curious - what is the largest message size that SendMail will successfully accept from an upstream source via SMTP? The tweaking config options page indicates that by ...
55
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5answers
55k views

How to send the output from a cronjob to multiple e-mail addresses?

In the beginning of a crontab file you could use the MAILTO instruction to indicate you want the output to be sent as an e-mail to an e-mail address. I would like to send the output to multiple ...
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1answer
2k views

message headers say dkim = fail, stats say = PASSED. why the conflict, and how to fix?

In some-not-all received emails -- notably ONLY those sent via 'bulk' services -- I get a DKIM fail: "signature verification failed". Here's one example: Received message headers DKIM-Filter: ...
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1answer
1k views

Exim ACL to limit sender to send mail only to localdomain

I'm currently using exim, and i need to limit a mail address to send mails only to local domain and deny mail to outgoing domains. I think it could be like this : deny local_parts = sender@...
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0answers
12 views

Force Postfix to Ignore Password Map when Direct Dispatching

We have a mail server that purely dispatches email. These are largely transactional emails, however we have a need to send a copy of these to our customers 'Customer Service' department. Due to the ...
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2answers
4k views

TLS connect failed: error:140943FC:SSL routines:SSL3_READ_BYTES:sslv3 alert bad record mac while sending mail via Qmail

I'm trying to send e-mail to one of the biggest polish hosting companies and their servers are refusing to receive it with message: TLS connect failed: error:140943FC:SSL routines:SSL3_READ_BYTES:...
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0answers
33 views

List yahoo/hotmail email domains

Problem: I want to get/find a list of yahoo owned domain names that would, given the same local part, go to the same mailbox. And analogously, a list of such hotmail domains. Background: I have an ...
0
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1answer
43 views

How do domains connect to internet and email (servers) globally?

I know of domain name registrars, that you can use them to acquire your own domain name for a website; but, how do they connect to the internet and email (servers) globally? I'm not exactly sure how ...
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1answer
1k views

Amazon SES not sending to multiple recipients (AWS SDK for PHP)

I've set up Amazon SES on my server. I'm using AWS SDK for PHP. It's version one. Here's the documentation. Here is the code I'm using to send: $to = $_POST['mailto']; $response = $email->...
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2answers
1k views

sendmail: website and email on same domain/server

I am using sendmail for my website, my email address is also using the same server name. So, www.zedsaid.com and nic@zedsaid.com. Sendmail seems to not want to actual deliver the mail to my inbox, ...
0
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1answer
46 views

Postfix removes <user>@ from recepient email address when sending from localhost

I have setup a local mail server using Postfix for test purposes. I have followed this tutorial to setup a 'Local only' Postfix mail server and I have also installed Thunderbird for testing. The ...
0
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1answer
36 views

O365 - Email redirecting to shared inbox

I have a odd instance where by an email (password reset) from one of our third-party providers is being redirected to a shared inbox rather than the user it was intended for. I can see on the ...
18
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4answers
42k views

Legitimate reasons SMTP “MAIL FROM:” will not match “From:” Header in DATA

Is there ever a legitimate reason for the SMTP “MAIL FROM:” field to not match the “From:” field in the DATA section of a message, besides mailing lists? From https://stackoverflow.com/questions/...
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0answers
17 views

Postfix doesn't send email via localhost

I've been struggling with a problem. Postfix don't want to send emails from nodejs application. When I send email from terminal, everything goes right, emails are sent (1 on the picture). But they ...
6
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1answer
239 views

Yahoo blocked emails after changing mail server public IP address

We have two exchange edge server and we want to change their public IP addresses. Changing one of the server IP addresses (and related DNS records) was done successfully and emails are delivered to ...
5
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1answer
1k views

OSX 10.6 integration into NIS/netgroup/automount infrastructure

I have an existing infrastructure where accounts are maintained under NIS (yp) with no local unix accounts. Also, all the standard maps including hosts, mail aliases, netgroups, etc...are maintained ...
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0answers
18 views

php mail() not working after successfully installed postfix

Recently, I've successfully installed postfix and configured. Then, I had tried sending an email via "echo" in ubuntu , to avail. However, the PHP mail() function is not working and showing nothing in ...
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1answer
38 views

Internal DNS errors from delegating a subdomains email to GSuite

I've outsourced a subdomain for email (say mail.example.com) to gsuite, while wanting to keep my exchange 2003 server authoritative for all of my other domains emails To the outside world the MX ...
2
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1answer
1k views

Hotmail/Outlook.com DKIM failure when signing with different domain - header.d ignored

We (sender.org) provide a mail server for a client (example.org) and sign outgoing messages with our private DKIM key (we cannot change the signing domain to the client's domain). Return-Path: ...
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2answers
6k views

Getting contact list from IMAP server

I want to update my local Thunderbird address book with a list of valid email addresses on an IMAP server. I'm not that familiar with IMAP, does it allow this? If so, could someone point me to an ...
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0answers
14 views

Collaborative Inbox account with Zimbra

I need to create a collaborative email system with Zimbra where: I have 20 users with a personal account in which they receive mail from a shared account (eg: info@contoso.com) They can each organize ...
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2answers
1k views

E-mail PTR failure - Spamcannibal

My IP is on Spamcannibal list. So I can't communicate with my registered partners. To be precise I can't send e-mail to only two domain. Everything else is ok. I try to talk with my domain/server ...
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1answer
2k views

Postfix 2.6.6 with TLS - unable to receive emails from GMail (and a couple of other MTAs) but others are OK, why?

I've just had to look at a CentOS 6 server running Postfix 2.6.6 which was able to send emails to everyone, but could not receive them from GMail (and a few other MTAs) due to incoming TLS negotiation ...
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0answers
15 views

mailman sending to local mail after add user

I have a Mail server with an account (mailman@example.com) relaying to the mailman server. The mailman@example.com list have 3 subscriber: aaa@example.com, bbb@example.com and ccc@example.com ...