Questions tagged [smtp]
Simple Mail Transfer Protocol is the protocol used for sending email.
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What port does windows 10 Mail app use for smtp server by default?
If I do not add a port after the SMTP server, what port does Windows 10 Mail use by default, 465, 587, or 25? I checked on all the options including "Require SSL for outgoing email".
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24 views
Port Sharing Issue
Recently I started experimenting with an email server hosted on a device on my own private network. The above mentioned server required me to open up ports on the router hiding everything.
As soon as ...
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1answer
38 views
Obtain Message-ID: header of sent mail in Outlook
Assuming a vanilla POP3 account in Outlook, how does one get
the Message-ID: header of sent email?
Alternatively, the raw MIME object as submitted to the SMTP
server would be equally valuable. E. g. ...
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14 views
exim4 configuration if local account name differs from remote login
In these homeoffice days, I want to configure exim4 on my home PC to send mails via our corporate SMTP server. For local exim4 configuration, I followed the instructions from https://askubuntu.com/...
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25 views
Gmail can't authenticate Office 365 Address via SMTP
Custom Domain registered through GoDaddy
Office 365 email purchased through GoDaddy
Trying to send / receive email for this address using free Gmail (not G suite)
I have reviewed every resource I can ...
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42 views
How do I reset my SMTP password?
After working for about three weeks, I finally got back the Thunderbird account that I thought was lost. Everything is fine except sending emails. Every time I send an email, a password is requested ...
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19 views
SMTP-Docker not sending emails, what am I doing wrong?
Please bear with me, as I only started out with Docker a couple fo days ago. I created a brand new VM with CentOS 7 in our ESXi server. Setup Docker and Portainer with no issues.
I wanted to create ...
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1answer
25 views
cURL: How do I set the email subject when using -F (multipart / attachment)
I'm trying to send an email using cURL. It has to include an attachment, so I'm using the -F / --form option:
(it's a single line, but I wrote here this way for clarificaiton)
curl smtp://smtp....
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0answers
31 views
Sending emails from Python 3 script with smtp library using a virtual machine in SUSE Linux Enterprise Server 11 SP4
I can't send emails from Python 3 script with smtp library using a virtual machine in SUSE Linux Enterprise Server 11 SP4. However, using exactly the same code from my Ubuntu 18.04 machine, works just ...
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1answer
39 views
antispam PTR checks against what domain
PTR checks the domain IP address to validate sender address.
But against what? the SMTP HELO hostname?
Or against email domain?
for example if I send an email from john@domain1.com from a SMTP server ...
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1answer
41 views
Selecting SMTP server
I have my email provider that provides SMTP server. My Internet provider also provides SMTP server. Which SMTP server is better to use in this situation?
Is it true that internet provider might ...
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1answer
120 views
Crazy Domains SMTP SSL Negotiation Fail
I'm in a bit of cat and mouse scenario regarding SMTP not working on certain software at multiple sites on multiple computers, Email provider says software and software says email provider issue.
...
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73 views
Seeing strange TCP retransmission traffic on smtp server port 25
I have been working on my postfix (and davecot) server and had wireshark open for debugging (and verifying that starttls was working).
Now I suddenly started to get some strange requests from many IP'...
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88 views
Postfix fallback to another SMTP in case of blacklist
I am managing a postfix+dovecot mail server with a few hundred email accounts. We are doing our best effort to filter spam and viruses in inbound as well as outbound emails. Nevertheless, it happens ...
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64 views
xampp on my machine does not enable me to send email through SMTP but it works on other pcs
I was just wondering why my xampp that I installed on my pc won't enable me to send emails through any Mailing APIs(PHPMailer, Swift, etc..)
It's a different case when I run my email-enabled project ...
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19 views
SMTP- IIS Email Delivery Issues
We have a WEBAPI that uses SQL Database and customers use it to create a report or pull the info from it.
Now the customers want the notifications whenever they have the data available or the reports ...
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6 views
IIS 7.5 SMTP Relay - sends held mail when stopping
I get a periodic build up of mail in the queue folder of my SMTP relay. For the most part email flow is fine.
When I stop the SMTP service the held mail gets sent rather than when it starts.
Anyone ...
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1answer
155 views
Make postfix use sasl / auth plain for outbound mail to a relay server
My postfix does not send AUTH PLAIN to the outgoing relay server.
It must have worked a couple of days ago, but now I get "relay not permitted" bounce mails.
The mail system runs in an Alpine Linux ...
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0answers
37 views
utf-8 content go through yahoo smtp become question marks
When I use thunderbird or other email client to send utf-8 email through yahoo smtp, it will become unreadable contents full of question marks. This only happens to yahoo server. I believe the yahoo ...
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127 views
ssmtp fails after second EHLO to google in raspbian
So I'm trying to get ssmtp setup on a raspberry pi for a diy security system. I created a new google account and enabled less secure apps. when I try sending an email it just fails without any error ...
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62 views
“smtp;550 5.6.0. Sorry, looks like SPAM to me”
I'm applying for a tech support job and I got a test that I have a week to complete, so I assume they expect me to do some research for it, so, here I am :)
I'm supposed to give my response to a ...
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1answer
63 views
Can I use the SMTP server of the hosting provider instead of the domain name provider?
If I purchased my domain name, say example.com, from X but have hosted my website with Y, and now if I need to use an SMTP server for my domain, do I have to use the SMTP server of the company X, or ...
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34 views
Why is Gmail a “Less secure app”?
I have two Gmail accounts:
example@gmail.com
example@mydomain.com
The first is a regular Gmail account. The second is a GSuite account.
example@mydomain.com forwards to example@gmail.com. I am able ...
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1answer
26 views
Can email server bcc another user to outgoing mail automatically
Can someone be receiveing all copies of my outgoing emails when I am using a web interface of an email server? Can the admin configure the email server to do so? If yes, will sending an email via the ...
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14 views
How to configure two “from” email with Postfix configured with Office365
I configured the Postfix to send email via Office365 following this tutorial
It's working fine.
But I want to send email from two different email adresses.
For example, ClientA will received an email ...
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1answer
148 views
SMTP Open Mail Relay vulnerability
I have to check if my server (SUSE 11) is used as an SMTP Open Mail Relay and, if so, block this unwanted feature.
I check /etc/postfix/main.cf and all relay's related variables are commented :
#...
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160 views
Using Snort to match a string in a SMTP attachment
I'm trying to write a simple Snort rule to detect for a string in a base64 encoded attachment in a SMTP email. I'm using the pcap sample from Wireshark (sample-TNEF.pcap.gz). The (decoded) string I'm ...
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1answer
84 views
Cannot send email in emacs via smtpmail + starttls
I cannot send emails in emacs via smtpmail with starttls. Here are my configs:
smtpmail-stream-type 'starttls
smtpmail-default-smtp-server "posteo.de"
smtpmail-smtp-server "...
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142 views
postfix timeout to send emails to gmail on port25
I am trying to setup postfix on ec2 amazon linux 2 instance.
While trying to send messages to gmail or corporate email, it is timing out
Sep 10 18:52:45 postfix-xxxxx postfix/smtp[4001]: xxxx: to=, ...
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2answers
148 views
smtpmail-send-it: authentication failed in response to AUTH PLAIN (emacs + mu4e + posteo)
I've been trying to set of my new posteo.net email account on emacs/mu4e (I have a gmail account that works on emacs/mu4e but would like to switch). I can successfully receive emails via offlineimap ...
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1answer
37 views
How can a port be filtered from one machine and open from an adjacent machine?
On my home network, I am trying to connect all the devices to the new SMTP (port 25) relay at my new ISP. I can connect to the port from 2 separate machines (laptop via wireless lan, raspberry pi via ...
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39 views
Why doesn't Postfix receive mails from the major mail services?
I cannot receive messages from iCloud, Outlook or Gmail, but I can when I remotely telnet on port 25 or send a test message using https://www.wormly.com/test-smtp-server I receive the message in my ...
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2answers
34 views
How does this email display part of its text selectively?
I get a daily email newsletter, and I noticed that in the Android Gmail app, below the sender and the subject, where usually one sees the first line of the email, there is a brief description that is ...
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16 views
Email to my Windows Server 2016 is not arriving in drop\ directory
When email is sent from Internet to my Windows Server 2016 computer, nothing arrives in:
C:\inetpub\mailroot\Drop\
When I send a test email from Internet to the server, Wireshark shows that the email ...
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0answers
40 views
Some email providers not receiving email
Good day,
I set up SMTP server I am using sendinblue SMTP also I checked my email score with https://www.mail-tester.com/ and scored 8.9 from 10.
I lose 1.1 point on reverse DNS but I think I just ...
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119 views
SMTP protocol synchronization error in Exim4 when connecting from Gmail
I have a Exim 4.92 server running on a Debian machine, everything works fine. Now I want to send mails from Gmail through that Exim server, since Gmail needs an STMP server for alias addresses.
...
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0answers
393 views
Postfix setup for Raspberry Pi 3B+ (non-dedicated mail server, fantasy FQDN)
Problem: Create a contact form that lets users of a website submit messages that are sent to an email. Use php's mail() and Postfix. Having trouble using/understanding Postfix? The setup must be ...
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18 views
Ask SMTP Server for Delivery Status Notification
I would like to know if this is possible to ask a SMTP Server if it received a specific email even if I'm not the server who sends the email ?
for instance, user a@sender.com is sending an email to b@...
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2answers
242 views
How can I send email reports to myself from my home server?
One would think this is a dead simple thing, but apparently it isn't—or I just really suck at it.
Context: I have a little home server hosting things like task-managers (TaskWarrior), my website, my ...
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41 views
How can I configure multiple domains between Exim and Mailgun SMTP service?
I have a server well configured with Exim sending emails through Mailgun SMTP. The credentials for the domain example.com are ok and the emails are being sent successfully. The only thing I'm trying ...
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28 views
OSX Maill application IMAP server disconnection on every email client
A friend of mine asked me to take a look at their MacBook Air (10.14 Mojave) because they have been getting continual IMAP server port timeouts on all of their email services. Well, I did the usual of ...
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0answers
84 views
XAMPP sendmail issue
I have the following configuration setup in XAMPP:
In php.ini:
[mail function]
SMTP=smtp.gmail.com
smtp_port=587
sendmail_from = *******@gmail.com
sendmail_path = "\"D:\xampp\sendmail\sendmail....
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31 views
outgoing mail not authenticated
Running devuan, mutt and exim4. For no obvious reason, outgoing mail failed.
I send a message to myself with
$ echo "test" | mail -s Testing haines@histomat.net
Although I thought mail speaks to ...
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0answers
36 views
Postfix refuse to send email from outside clients
I'm running an smtp server (postfix) inside kubernetes - the server is not accessible from outside the cluster.
Note: smtp2.XXX.eu is registered as MX entry, anyway gmail accepts mails in following ...
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437 views
jenkins email ext plugin not working for office 365 account, How to resolve this?
Email ext plugin not working for office 365 mail account but working for Gmail..any suggestions how to fix that.
And also it is working for normal email notification.
I have done some steps for ...
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0answers
15 views
How to filter out “Crawlers”/Image Proxies when tracking email content or links and get ONLY real clicks of the user
Currently I am working on a feature with which I should be able to track E-Mails and the links in it. So when a user clicks on a link in an image I make some entries in the database so that I can make ...
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1answer
148 views
Mail getting stuck in queueu with Postfix/Spamassassin
Happy Star Wars day everyone.
I'm having trouble with a fresh postfix + spamassassin + dovecot +amavis install on Debian Stretch.
Incoming mail is hung up in the queue with a "mail transport ...
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2answers
408 views
Linux Mail Blocked By Gmail 550
I have a website set up on a CentOS server which has a contact form on it set up to send mail to a gmail address.
However the mail is being blocked by google with the following error:
Diagnostic-...
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1answer
31 views
How to emulate Postfix 3.3 setting “header_from_format” in Postfix 3.1?
I'm running Ubuntu 16.04 LTS Server providing Postfix 3.1 and have a setup in which Postfix generates the following From-header for mails:
From: support@example.org (root host.example.net)
The same ...
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1answer
387 views
Configure Postfix mail server to send emails to Gmail
I am running a Postfix mail server on an Apache web server on Ubuntu 18.04.
Problem:
I am able to send emails to my work email address, but I am unable to send them to my Gmail account. They do not ...
