Questions tagged [sendmail]

General purpose email routing software that supports mail transport via TCP/IP using SMTP

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34 views

Debian 10: sendmail service stops constantly

Whenever I start sendmail service, it reports May 01 00:51:43 systemd[1]: Starting LSB: powerful, efficient, and scalable Mail Transport Agent... May 01 00:51:43 su[6784]: (to smmsp) root on none May ...
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12 views

Why is sendmail only logging internal messages to /var/log/mail?

I'm pretty sure that in the past my sendmail (triggered from PHP) was logging messages sent from PHP to the MTA and also MTA to the recipient. Although emails are received by the recipient and I can ...
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34 views

Sendmail not relaying to 127.0.0.1:25 instead of smart host

I am trying to use a SMART_HOST on RHEL7 with sendmail. I have configured sendmail.mc as follows: define(`SMART_HOST', `my.relay.com')dnl After compiling I have this line in sendmail.cf: # "...
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61 views

Mailbox file of mutt suddenly disappeared

I have recently seen that my entire mailbox with mutt has suddenly disappeared. I don't know how to backup, if it is possible ? I am on Linux Debian 10. The sent file of all mails sent has not ...
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33 views

sendmail - how to unknown local user

I'm using debian as my webserver and sendmail as my MTA I do NOT have mydomain.com in the hosts file. I have setup sendmail.cf with the following dnl # Masquerading options FEATURE(`always_add_domain')...
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29 views

Centos 7 Withe Sendmail & Dovecot. Auth Broken

I have tried many different configuration options but using either Outlook or Thunderbird on macOS I cannot send through a server migrated to a new machine. I have done the Dovecot troubleshooting ...
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55 views

Getting SENDMAIL (as a client) to use AUTH LOGIN

I am trying to use SENDMAIL (v8.15) on a Pi in my network to just forward mails to my SendGrid account. This is needed because my legacy webcams on my network cannot use the very long password ...
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15 views

Postfix receiving outgoing mails with my domain hosted on another server

I have two different hosts. My domain and email system are located on server1. But I am using server2 for redirected subdomains. On server2 I am using postfix to send emails to the email system of ...
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29 views

Is it ok (regarding spam) to use yahoo to send email from our domain me@mydomain.com?

I m enough of seeing my email arriving in spam folder. I would like now to send my emails not from my smtp server but from yahoo mail server. When you have a yahoo account, you can choose to send ...
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60 views

How to properly configure sendmail to delivery message? [closed]

I bought a VPS from OVH. This Ubuntu VPS hostname is something like vps12345 or vps12345.ovh.net. If I test sendmail via command line to send an email to my mail test@gmail.com, it works: I receive an ...
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How can you set the SMTP envelope MAIL FROM in AIX 6.1 Sendmail?

We have new SMTP relay host and it requires that the sender's email address should be the company's official email domain instead of server hostname Already did masquerade using generetics table. ...
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Sendmail says email sent but it's not getting delivered

Sorry I'm new to this forum, I have setup sendmail on my Ubuntu 20.04 server I run on my own remote server, when I send a form from my website it says sent successfully but it never arrives to the ...
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136 views

“Sender address rejected: Null sender not allowed here” when forwarding e-mail sent from an gmail address

I'm trying to have an e-mail address at my @example.org forward to an external e-mail address outside my domains. When using my ISPs SMTP relay server, I get the following error: Dec 27 15:10:40 ...
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45 views

Sendmail: How to connect to TLSv1.0

Is it somehow possible to make Sendmail (version 8.15.2-14~deb10u1) "speak" TLSv1.0 without changing the system default values in /etc/ssl/openssl.cnf (which will be MinProtocol = TLSv1.2 ...
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92 views

Mail queue timing out with sendmail to port 465

I have a working sendmail installation that now needs to send to a different smarthost, on port 465 (instead of 25). I made the following changes to my sendmail.mc define(`SMART_HOST',`mta.mydomain....
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207 views

Cannot start opendkim service, but command line works fine

Good morning.. I've read about 15 different guides on setup with DKIM and Sendmail signing on ubuntu 18.04 and for some reason I cannot get the service to start, yet command line works fine /etc/...
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Sendmail: Is there any way to send out messages in dead.letter?

I've had a sendmail problem recently and a lot of emails, which should have been sent out, got stored in /var/lib/sendmail/dead.letter. Since the sendmail problems are fixed, is there any way to send ...
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463 views

How can I check the outgoing HELO name of my sendmail server?

My email server got blacklisted and I get the following message from Zenhaus CBL: X.X.X.X. was found to be using the following name as the HELO/EHLO parameter during connections: "localhost....
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168 views

How is sendmail sending emails without port 25 opened? [closed]

I have Amazon AWS server which I'm configuring to receive emails. AWS states that port 25 is closed for outgoing connections unless you specifically apply to have it opened. But I tried to send an ...
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27 views

Sendmail mailer definition doesn't always obey U=username:group

I'm attempting to use Dovecot virtual users with sendmail, based on this post using sendmail, dovecot-lda and sendmail's mailertable lookup. This is mostly working. The only remaining issue is for ...
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33 views

Root mailbox permissions being changed

The permissions on my root mailbox /var/spool/mail/root (with user root:mail) are reset from -rw-rw---- to -rw------- whenever "Mail Delivery Subsystem MAILER-DAEMON@drjack.info" sends a ...
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1answer
100 views

Sendmail - retry instead of permanent failure on DNS errors

The last few days, our hosting provider has had occasional connectivity issues with one of their upstreams. Each time this happens, we end up with a heap of outbound emails that Sendmail gives up on. ...
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73 views

Email issues to a specific email provider (bellsouth.net) failing with “stat=Data format error”

I have a site that sends emails to users. One user in particular is not receiving emails. I have looked at the logs and I found: Nov 9 21:27:22 ******** sendmail[28960]: 0A9LRK37028960: to=**********@...
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80 views

Stop cron jobs from sending emails as root but allow sendmail to work

I've recently got Postfix working as a send only MTA relaying through Google Workspace (formerly Google G Suite). I would now like to send emails after completed cron jobs to my personal email. The ...
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34 views

Sendmail relay office365 (gmail works)

I have a virtual Debian 10 machine which I want to configure to send emails using office365 smtp relay. I set up and configured sendmail, but when I try to send a test email, the log file says DSN: ...
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30 views

Ubuntu 18.05 mail client error 36

I have configured CIS benchmarking, and the setup script sends an email from the build machine as the image is baking which works fine (sSMTP is configured for the purpose via Gmail). However, by the ...
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40 views

Why sendmail sending blank text file?

I want to create a script which able to send the log file by email. The problem now is the text file I have received through email is blank. Which part is the problem? MYSQL_SLOW_LOG_USER="****&...
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90 views

EC2 Instance can't email it's own domain

I have SES setup with Sendmail on my EC2 Instance. It's working fine when I email any other domain, e.g. user@gmail.com. But let say my server's hostname is example.com, if it tries to email it's own ...
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424 views

Configuring sendmail to send email to Outlook server

Currently, I'm using Redhat distro and I can send emails to Gmail server with sendmail but when I try to use Outlook server it generates the log below in maillog file. (outlook_sender@mydomain send to ...
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45 views

Opendkim running but not signing?

I have had a lot of fun with OpenDKIM - it is actively running on my Debian box and here is my code: root@web1:~# tail -f /var/log/syslog | grep -i dkim Sep 7 16:35:38 web1 sm-mta[1504]: ...
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Linux sending system-local mail is not working with AD users

I am experimenting around with a Linux system in my free time, and today, I've noticed that the regular /usr/bin/mail is not working with my users that come from my Windows domain (the user does not ...
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mail.log size keeps increasing drastically

Suddenly in the past few days, i could see the mail.log(linux server) keeps growing drastically (10 gb a day). On checking the logs it contains nothing but the below lines. I suspect the issue with ...
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173 views

Deferred: Connection timed out

I am installing Sendmail on a Debian box. I have tried twice now and each time am getting the connection deferred error. I have run the following processes: apt-get purge sendmail* apt update apt ...
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47 views

Sendmail: Reject Bare To: Headers

Is there a way in sendmail to reject messages with To: headers that don't include a domain name, rather than masquerading them? We have a broken client that uses the correct recipient address in the ...
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19 views

Extract attchment from /var/spool/mail/root

Following an incident, my sendmail rejected all the mail and send the undelivered status with the error message on /var/spool/mail/root. There are hundreds of mail. As the incident is closed, I would ...
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79 views

Reload sendmail when cert is renewed

Recently I upgraded Letsencrypt certs but forgot to restart sendmail. Is there an option in sendmail checking the cert files updated? The starttls.m4 contains this: define(`CERT_DIR', `/etc/...
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62 views

tricky sendmail relaying on the same IP

I recently moved my postfix server on docker using the mailu image on my raspberrypi 4 (rasbian buster). I uninstalled totally postfix so as to be sure there are no remaining things that would ...
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166 views

Messages from [IP address] temporarily deferred due to user complaints

I have spent a solid 2 or 3 weeks following tutorials and going through trial and error trying to set up my own mail server using Postfix and Dovecot on Ubuntu 18.04. I finally have SPF/DKIM/DMARC ...
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using sendmail server when smarthost is added, unable to send mails to my mailbox. Have anyone have milter-bcc configured successfully?

using sendmail server when smarthost is added, unable to send mails to my mailbox. Have anyone have milter-bcc configured successfully ? or do we have any alternative process that worked for anyone ?
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50 views

Disable local delivery sendmail

I'm trying to disable local mail delivery on my sendmail server (CentOs 8). I've read many posts about this (for example: Disable local delivery in Sendmail) but non of the awnsers seem to work. I ...
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22 views

Commercial SSL cert doesn't work on sendmail

I am running a mail server with sendmail and have generated key and csr with openssl and purchased a commercial certificate. When I use the commercial cert in sendmail.mc and try to send email I am ...
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129 views

SMTP server not sending DSN

Is the outgoing smtp server expected to notify sender of failure in upstream transfer giving this scenario?: User A tries to send email message via his Outgoing SMTP (A-SMTP) server to recipient B. ...
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3answers
973 views

No package sendmail available

Unfortunately, my server is unable to send email. I found the following tutorial by searching the web: https://pepipost.com/tutorials/install-sendmail-server-centos-7/ But when I enter the sudo yum ...
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80 views

Sendmail sends everything except for mails with recipients of the same domain

I am using the following setup. The client's DNS is pointing to Hostgator, but the client wants to test if his site runs faster on DigitalOcean. So the only DNS records I am pointing to DigitalOcean ...
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87 views

How to whitelist users at the MX server, instead of the mail server, using Sendmail

I am running Sendmail 8.15.2 on Fedora 30 with a MX relaying to a mail server. The relay-domains file works fine to funnel only the desired domains from the MX to the mail server. But the mail server ...
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118 views

Cron Job is not sending output of script as email, while same script is sending email if being run from cli [duplicate]

I have a script which gives output in a file and doing few awk operations on that output file and mixing the output of two files using paste -d and then sending the email of newly created file to ...
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171 views

relaying denied - why is sendmail authenticating the sender instead of the recipient

I am trying to set up an email server that receives email from a mx server using sendmail software on Fedora 30. When the mx forwards email to the email server, the logs show a Relaying denied - ...
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18 views

${mail_host } macro on sendmail.mc is returning an empty value

I've created a custom header and I'm trying to set its value to something like username::domain:servername. For example, messages from user@mydomain.com using myserver as the MTA should generate a ...
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423 views

How to add custom headers on sendmail

I have a sendmail server and I'm trying to set it up to add a custom header called "Feedback-ID" to all outgoing messages in order to keep track of the messages sent from the server using Google's ...
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1answer
109 views

CentOS 7 sending e-mail crons while sendmail is not installed

Background I have configured my crontab to send me emails that way MAILTO=myemail@company.com ... And I am receiving the e-mail in myemail@company.com's inbox through the company SMTP server ...

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