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Questions tagged [smtp]

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

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Postfix Receiving Email issue

POSTFIX - DOVECOT - NODE JS - SMTP - RECEIVING_EMAIL I have completed the setup for sending email from my custom domain using the Postfix Smtp server. Now I need to receive the email from any mail ...
AIT DEV's user avatar
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Your email is tagged as "does not exist" by the Sendgrid

Looking for help here guys i can't receive an email from them im using gmail. But here is there reply to me your email is tagged as "does not exist" by the Sendgrid. What is the root cause ...
Jayson Abalos's user avatar
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Alpine Mail - use 2 smtp servers for my 2 email accounts

I have been using Alpine for a few days and have managed to retrieve my two email accounts @web.de and @gmx.de. They are displayed in the Folder List. I can read and delete Mails etc. Fine. But: How ...
Ingo Rodowsky's user avatar
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TLS Certificate Verification Error

We have a WordPress website configured to send mail using smtp.office365.com via the WP Mail plugin, but can't currently send mail with SSL Verification enabled. Without verification, the email works ...
Kyudos's user avatar
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Unable to set up email clients with IMAP - on multiple emails and systems

I'm having trouble fixing my email client setups - it appears the connection keeps getting rejected by the server. I have an (ollld) arcor.de email address, that had been synced via IMAP to both ...
Giogina's user avatar
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SMTP port listening for relay/submission

I have been reading the SMTP spec and other related RFCs (mainly 8314 & 6409) and can not wrap my head around it so I hope you guys can help me out. I'm trying to setup an SMTP server for testing ...
biohzrdmx's user avatar
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Windows 11 network connection error. I think something with ssl/tls

I came across with the network problem on Windows Home 23H2. One day, my Outlook 2010 has break to receive letters. In the log, I got the message error 0x8004210A. I tried all the methods pointed here,...
Andrey Avakov's user avatar
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130 views

Why is Postfix using a lookup table?

I am trying to send mail locally using Postfix. What I can't understand, is why a lookup table is being used. I am attempting a minimal Postfix build from source, so have omitted berkley DB support. ...
user10709800's user avatar
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Why can't NTFY authenticate with MS Outlook?

First and foremost, Microsoft documentation advises these details for SMTP with outlook. I use this fine with other services. SMTP server name: smtp-mail.outlook.com SMTP port: 587 SMTP encryption: ...
MrChadMWood's user avatar
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trying to send emails in bulk, but there is something wrong with my smtp configuration

I'm unemployed and looking for a job. Therefore I need to send emails to a lot of companies. This case is about unsolicited applications. The body of the email is the same, but the recipent is ...
Paco 2015's user avatar
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Sendemail and others authentication fail: I’m getting invalid credentials provided

Im trying to use sendemail and sawks to send an email via SMTP of mail.com or yahoo.com or gmail (those are the ones I spent almost a day). They all are failing at authentication phase i.e. AUTH LOGIN....
Surepic 342's user avatar
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Why does AWS SES close the connection when attempting AUTH LOGIN?

I am attempting to send a test email via AWS SES. I have my smtp endpoint and smtp credentials all set up. I am testing using the command openssl s_client -crlf -connect email-smtp.ap-southeast-2....
ZeunO8's user avatar
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OpenSMTPD from address rewrite

I am trying to use OpenSMTPD to re-write all instances of the from-address in an email header. Here's the scenario I'm trying to solve for... I have an email distribution list that various people ...
mikem's user avatar
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2 votes
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Mail Server and Google Mail

Issue I have just set up an email server using Postfix, POP3 and IMAP, following the instructions listed here: https://help.ubuntu.com/community/PostfixBasicSetupHowto Sending/receiving mail locally ...
user10709800's user avatar
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what is to be done to send a mail from curl from windows task scheduler or just by clicking on the batch file?

when I run the following command in a script (using a win10 laptop) c:\curl\bin\curl.exe -v -k --connect-timeout 100 --max-time 200 --url "smtps://smtp.gmail.com:465" --user "user@gmail....
Thelappillil Linson's user avatar
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Microsoft Office 365 cloud not working in Ubuntu 22.04

I recently installed Ubuntu 22.04 and I noticed that it has many problems, especially with Microsoft products. I use Microsoft Teams as a work tool so I always need it, and I can't seem to be able to ...
Kaïss Bouali's user avatar
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NOQUEUE: reject: RCPT from unknown[x.x.x.x] in Postfix

I cannot either receive or send e-mails from my Postfix server. by seeing the mail.log file, I see errors like this: Dec 15 22:11:49 zeus postfix/smtpd[17078]: NOQUEUE: reject: RCPT from unknown[163....
jstuardo's user avatar
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Automatically respond to spécific subjects with mutt

I need to automate some tasks. Is there a way to receive a mail using mutt and respond to it if the subject match a desired list? Example: If I receive a mail subject beginning with hello or hi or ...
Damien 's user avatar
1 vote
1 answer
268 views

Let postfix reject unauthenticated emails from my own domain

I have an email server running on Debian11 with postfix. I have strict restrictions implemented (SPF, DKIM, ...) to prevent spam. Works fine so far. But recently I just realized every guy with a valid ...
Christian's user avatar
2 votes
2 answers
702 views

Thunderbird: Two email accounts using the same SMTP server

This is a recent problem, which I did not have until the past month. I have two different emails from the same Spectrum account, one for personal and one for business. They both use the same SMTP ...
Kim Wilson's user avatar
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Using postfix, how to replace _sender_ address with a specific value, depending on the _destination_ address?

I have a peering SMTP server (say, example0.test) that is rejecting all mail that is not sent from a specific address. (Say, [email protected]). In postfix, whenever it sees a mail sent to '.*@...
user10732's user avatar
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How do I setup DNS for a local email server with a SMTP relay

I'm trying to move my mail server (multi domain) to my home to increase security/privacy. Therefore I set up a local server and a SMTP relay (postfix) on a hosted VPS (because of static IP, etc.). ...
cpt_wonderful's user avatar
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Thunderbird not prompting for SMTP password, and password does not already exist

I'm using Thunderbird for work mail on Linux Mint 21.2. We have an IMAP server for incoming mail and SMTP for outgoing. Logging in to IMAP works fine, I receive and can read all my emails. However, ...
Clay's user avatar
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1 vote
1 answer
575 views

How to fix legacy and third-party systems that send emails to office365 users?

Esp. in the last couple of years, we have seen steadily increasing problems when our internal applications/servers send emails (reports, alerts, warnings, and what-not info) to our internal employees/...
Rop's user avatar
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If I am Sending Emails On Port 587 Why Do I Need To Allow Port 25 In My Firewall For Postfix

I am using my postfix smtp to send ONLY outgoing emails. It will not receive incoming messages. I have my mailbox at Namecheap for that. I use a client called Mailwizz to connect my Postfix SASL user ...
Digital Joe George's user avatar
1 vote
1 answer
2k views

Change Postfix Sender Envelope MAIL FROM Address To Match Return Path Header Email For Multiple Domains

I need some serious help guys. I am fairly new to postfix but have spent countless hours researching about my question. Let me cut to the chase... I would appreciate your responses entirely and please ...
Digital Joe George's user avatar
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292 views

Outlook blocking ip using spamhaus despite server not being on list

2023-09-05 Reply to email from example.com Receive response: [email protected], relay=example-com.mail.protection.outlook.com[52.101.68.18]:25, delay=6.5, delays=6.1/0.02/0.35/0.03, dsn=5.7.1, ...
TheChubbyPanda's user avatar
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427 views

Exim4 e-mails not going out

I'm running a Ubuntu VPS (running 20.04.6 LTS), on which I have installed exim4. I want to use exim to send some e-mails from a PHP application I have running on this server. I am not interested in ...
Patriot's user avatar
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Postfix delivers messages locally despite configuration for discovering external agent

A small node operates several web applications attached to a domain. The same domain is used for mailboxes, hosted off site by a commercial service. On the name server operated by the registrar, A, ...
brainchild's user avatar
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259 views

Trouble with PHPMailer and iCloud SMTP Authentication

I'm currently facing an issue with PHPMailer while trying to send emails using iCloud SMTP for my WordPress blog. I have followed the steps to configure PHPMailer with app-specific passwords provided ...
Maciek Rek's user avatar
2 votes
1 answer
185 views

Send email from gmail as another email address from an owned domain name

tl;dr; I would like to send emails using my domain extensions. I own some domains registered on Gandi, and I would like to send you an email using an email address using this domain extension. ...
nowox's user avatar
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Confused for configuring mail server (Exim)

I would like to setup an outgoing SMTP server on my server. My ISP blocks port 25, so, I've read I must use relay host (likely my ISP smtp server). I want the recipient to see the sender email as user@...
Gwendal's user avatar
1 vote
1 answer
289 views

is it posibble to have mail server to backup host mail. (imap and smtp)

Can I have 2 email servers? One is in a VPS (planning to use contabo with cyberpanel) the other is the current hosting provider (dailyrazor). I keep getting down times for the email. Can they back up ...
Onur Topal's user avatar
-1 votes
2 answers
180 views

windows smtp server to send sms ? who can help me

I am trying to setup a smtp server on my windows 10 vps server. I would like to use it for sending sms. I tried a few softwares that are free but none worked. In particular, I tried to install this ...
J0natan4's user avatar
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Cannot receive catch-all email from some servers

For years I have been using the email catch-all feature to track how companies treat my email adress, i.e. I will be able to detect if they sell my email and can confront them or add a filter that ...
Bimme's user avatar
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2 votes
1 answer
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Redirect OR warn (during initial negotiation?) SMTP submitters to use TLS on port 587 - leave 25 explicitly blocked by firewall for better security

This question went over poorly on S.F., but as I said there I've managed to find a lot of closely related information, but not an answer truly addressing my question. I am expanding on my homelab ...
MJHd's user avatar
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How do I have more than one database for SASL authentication in Postfix?

I currently have Postfix set up to authenticate submission with SASL. The database connection info is stored in /etc/postfix/sasl/smtpd.conf However, I cannot for the life of me figure out how to have ...
CabbageGremlin's user avatar
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Is it possible to connect to remote 465 via own 443 port?

I have asked this question and am opening a new question as per SE policy. The remote SMTP server can be connected to via its own 465 port. However, I want to reach that server via a cloud server. ...
Sean's user avatar
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1 vote
1 answer
181 views

Piping commands to smtp server doesn't work

So I was trying to write a bash script to send a mail to someone using smtp.gmail.com server by using openssl. Everything upto this is working fine: printf "helo gmail.com\nauth plain $auth\n&...
Cardinal's user avatar
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167 views

exim4 different passwd.client for different sender or router

I am using exim4 with a couple of smarthosts to send email from my private mail server. I have a default smarthost, but I also use official SMTP relays for accounts using senders from domains handled ...
pereric's user avatar
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494 views

How do you change Amazon SES access key for SMTP client / Microsoft Outlook?

I was trying to change my outbound SMTP password (after the LastPass breach). I set it up a while back using Amazon SES but now working with this sucker is anything but easy. So I logged in to the ...
c00000fd's user avatar
  • 557
2 votes
3 answers
545 views

Does email you send or reply to contain privacy information that spammers could use?

I have received a few emails recently that seem like spam but they are asking about open source projects I've worked on and gmail didn't flag them as spam. When I email or reply to an email does ...
1.21 gigawatts's user avatar
0 votes
1 answer
54 views

How long should I wait before fetching the "SENT" mailbox after sending an e-mail?

I have made my e-mail client immediately fetch new e-mails from the IMAP server (only opening the "Sent"/"Sent mail" mailbox) right after a new e-mail has been sent. To my (slight) ...
Gawain's user avatar
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0 votes
0 answers
642 views

Scan to mail with Exchange Online/Office365

A year ago we've migrated from an on-premise IT environment to a Cloud based one, using Office365 and Azure. E-mail has been migrated to Exchange Online. We have a couple of scanners (MFP) that need ...
marcdb's user avatar
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1 vote
2 answers
1k views

How to send email with thunderbird without configuring an incoming email service

I'd like to set up thunderbird for outgoing email only. I have no incoming email service I want to use with thunderbird. I set up an outgoing email connection through account settings, but when I go ...
Martijn Hoekstra's user avatar
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325 views

exim mail server send receive ipv6

IPv4 mail is working fine with DKIM, SPF, etc. I can send to Gmail no problem and all validations pass. Hotmail/Outlook also work after doing validation with them. I can send IPv6 mail through my ...
Brian's user avatar
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1 vote
0 answers
85 views

Config SMTP of office365 for another connected email

I have an account at office365 and connected another email to it. For example: [email protected] [email protected] --> can log in to Hotmail via this email Each of them works fine with their SMTP ...
Siamak Ferdos's user avatar
2 votes
2 answers
374 views

Search Application Log for string based on timeframe with PowerShell

UPDATED 10.11.2022 I added the timeframe parameters, but I'm getting an error message for an empty body. How do I prevent this? This is my current script: $Subject = "EventLogAlert {0:yyyy-MM-dd ...
Life is complex's user avatar
0 votes
1 answer
464 views

What are potential problems when sending emails with a different "from" than actually authenticated to SMTP? [closed]

I am building an app where customers can send emails. In order to make that work I have an account to a SMTP server with my own domain just to send emails. I want my own email to be unknown so when ...
Ero Stefano's user avatar
2 votes
0 answers
75 views

How does SMTP servers authenticate to each other

As a regular user, to send email through a SMTP server, e.g. gmail, I need to authenticate. However when gmail send an email received from its user, to a different domain, e.g. outloom.com, it also ...
DrizzleX's user avatar
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