Questions tagged [smtp]

Simple Mail Transfer Protocol is the protocol used for sending email.

Filter by
Sorted by
Tagged with
1
vote
1answer
39 views

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".
0
votes
1answer
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 ...
0
votes
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. ...
0
votes
0answers
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/...
0
votes
0answers
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 ...
1
vote
0answers
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 ...
1
vote
0answers
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 ...
0
votes
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....
1
vote
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 ...
1
vote
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 ...
2
votes
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 ...
0
votes
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. ...
0
votes
0answers
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'...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
1
vote
0answers
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 ...
0
votes
0answers
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 ...
1
vote
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 ...
0
votes
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 ...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
0
votes
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 ...
0
votes
0answers
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 ...
1
vote
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 ...
0
votes
0answers
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 ...
0
votes
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 : #...
0
votes
0answers
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 ...
0
votes
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 "...
0
votes
0answers
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=, ...
2
votes
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 ...
0
votes
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 ...
0
votes
0answers
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 ...
1
vote
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 ...
0
votes
0answers
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 ...
0
votes
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 ...
1
vote
0answers
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. ...
0
votes
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 ...
0
votes
0answers
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@...
0
votes
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 ...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
1
vote
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....
1
vote
0answers
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 ...
0
votes
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 ...
0
votes
0answers
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 ...
1
vote
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 ...
1
vote
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 ...
1
vote
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-...
0
votes
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 ...
0
votes
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 ...

1
2 3 4 5
11