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Questions tagged [sendmail]

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

sendmail is a popular Unix-based email routing facility that makes use of and supports the transfer and delivery of email via the Simple Mail Transfer Protocol (SMTP) and many other ways (e.g. UUCP).

sendmail exists both as free and open source software and as a commercial project, called Sendmail.

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process mail in /var/spool/clientmqueue in linux

How do I get sendmail to process mails in /var/spool/clientmqueue? sendmail -q does not work for this directory.
Robert
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Disable mailing in cron globaly

The web is full of suggestions how to disable mailing in cron like asked here stop linux from emailing me cron errors?. Is there really no global config flag I can set to disable mailing in cron for all users and all commands. I really don't want to…
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ERROR: Message not sent. Server replied: 354

On webmail every user gets error "ERROR: Message not sent. Server replied: 354" while sending mails. But mails are sent properly and reaches properly. Can you tell me where is problem, and why it is occurred? UPDATE: I found in some resources that…
user48058
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Is it necessary to manually rebuild a sendmail.cf file or is this done automatically on service restarts?

CentOS 5.x | SendMail I'm noticing inconsistent information regarding pushing changes from sendmail.mc Some documentation suggests that making changes to the sendmail.mc file requires two steps: Rebuild the cf file: m4 /etc/mail/sendmail.mc >…
Mike B
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How to disable reverse DNS in Sendmail

I would like to disable reverse DNS lookups in Sendmail. We have an SMTP relay, running Sendmail, with an IP-based access.db. We have no requirement for reverse lookups and, in fact, they may be contributing to delays in response time. This…
theirpuppet
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Is there a way to completely disable outbound opportunistic TLS support in SendMail?

CentOS 5.x SendMail 8.14.4 An overzealous network security feature is causing TLS negotiations to fail when my Sendmail server tries to talk to external hosts. This is causing sendmail to constantly requeue some messages because it won't fail over…
Mike B
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Change sender address of queued mails

Is it possible to change the sender address of mails that are already queued? The relay-server we've used so far has silently changed its policy a few days ago and rejects now mails without a verified sender address. We've now adapted sendmail's…
z00bs
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How to reject/detect emails claiming to be from my own domain?

We have following e-mail topology: Exchange server --------- Sendmail server ---------------Internet On sendmail server there is no any user mailbox and messages with sender address user@my.domain.com can arrive only from exchange server and never…
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Sendmail : ignore local delivery

I've a Ubuntu webserver with Sendmail as my MTA Currently when i email outside my webserver's domain e.g. example.com to something like gmail or any other email outside the example.com domain it works perfectly. I don't want my sendmail daemon to…
Derek Organ
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How to configure sendmail to use a different SMTP server?

I'm trying to configure sendmail on Centos 5 so that all mail goes through another SMTP server. In this case, it happens to be an Exchange Server. I've edited the sendmail.mc file with this line: define(`SMART_HOST', `10.1.1.30')dnl But when I…
user43049
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Linode w/ Google Apps - how to get mail from PHP working?

I have a CentOS Linode instance that I'm running as a LAMP stack. I'm also using Google Apps for email. I have my MX records pointing at google's servers and everything is working in terms of relaying my emails just fine. However, sendmail on the…
Richard Nichols
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sendmail vs smtp server

I currently don't have a SMTP server setup. However, in my PHP code, I send all my SMTP request to sendmail. Are there any down fall to using this procedure? If yes, what are the advantages of sending all the STMP request to a 'centralize' SMTP…
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No DKIM headers in sent mails from postfix

I have two postfix, one for receiving mails and the other for sending mails, and I am having trouble signing dkim on my outgoing mails. I followed this tutorial. Logs also is not helping me point to the main problem. OpenDKIM is running fine: ●…
user13539846
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Sendmail to local domain ignoring MX records (part 2)

I have the exact problem, like in this post: Sendmail to local domain ignoring MX records . I am also using an email provider like GMail For Your Domain (which stores your mail and manages it). I am sending mail from my server directly, but…
Vladislav Rastrusny
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Can't change sender address/domain in sendmail

I have a server with sendmail and I need to send email througt PHP. I have an internal SMTP server on the same subnet, so I configured sendmail with FEATURE(nullclient', mail.server.local')dnl where mail.server.local is solved with an internal IP in…
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