Server Fault Stack Exchange
Server Fault Stack Exchange

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.

1333 questions
5
votes
1 answer

Why are messages queued and not sent with sendmail?

I am having trouble with one of my sendmail servers. Users are informing me about that registration emails do not arrive. The logfile claims that the message has been queued, but the queue is empty: sudo cat /var/log/mail.log | grep email (with…
merlin
  • 2,093
  • 11
  • 39
  • 78
5
votes
1 answer

Sendmail: "TLS verify=FAIL", "554 5.1.8 : Sender address rejected: MX record not found"

Have been struggling for a day already and can't find solution. When try to send mails to some hosts: Jan 5 10:31:37 vps**** sm-mta[2192]: STARTTLS=client, relay=mail-x.*****.co.uk., version=TLSv1/SSLv3, verify=FAIL, cipher=DHE-RSA-AES256-SHA,…
Amundio
  • 153
  • 1
  • 4
5
votes
1 answer

Sendmail adds X-Authentication-Warning for trusted users?

So, I've digged through tons of articles and answers to configure sendmail on Ubuntu 12.04 correctly but still my emails are being flagged with X-Authentication-Warning header by sendmail: X-Authentication-Warning: advisor.travel: www-data set…
WASD42
  • 208
  • 3
  • 11
5
votes
3 answers

Error when sending mail from command line as non-root user

I'm trying to send mail from the command line as a non-root user on CentOS. I'm using the following command but getting an error: $ echo test | mail -s "test" to@example.com -c cc@example.com WARNING: RunAsUser for MSP ignored, check group ids…
Leo
  • 983
  • 7
  • 21
  • 39
5
votes
2 answers

AOL bounces with: AOL will not accept delivery of this message

AOL started bouncing emails from my mail server with the following error: 521 5.2.1 : AOL will not accept delivery of this message. 554 5.5.0 Remote protocol error On the troubleshooting page AOL asks for specific error code but all I get is a…
moorray
  • 53
  • 1
  • 1
  • 4
5
votes
1 answer

Postfix stops picking up mails at night

Our postfix system stops sending mails at night. Every night at 2am it stops picking up mails. The server is a monitoring server, which sends a lot of mails per day. /bin/mail drops the mails in the postdrop queue where postfix pickup picks up the…
GotAQuestion
  • 51
  • 2
5
votes
1 answer

Sendmail - Is it secure, and really essential?

I have a web application server running Ubuntu. The Application is built in Python/Django, but does not have any specific use cases to send email. We have log management software that allows us to check all logs, so we don't have any need for…
blispr
  • 159
  • 5
5
votes
1 answer

Abnormal sendmail activity using up the server memory on my Ubuntu 12.04 server

Environment Rackspace Ubuntu 12.04 Wordpress MySql The issue I have been experiencing quite serious out-memory-issues in the last couple of days. While I resolved one possible cause the issue I still get a very suspicious activity of sendmail.…
zabumba
  • 164
  • 1
  • 2
  • 10
5
votes
2 answers

Sendmail: Setting envelope sender to a fixed value

I need a way to configure sendmail to set the envelope sender of every message to a fixed value (say foo@bar.com). Note that this is not answered by any of the MASQUERADE features/macros (that I know of): I want to also override the envelope user…
Alien Life Form
  • 2,309
  • 2
  • 21
  • 32
5
votes
1 answer

Debugging sendmail - dsn=5.0.0

I am getting alot of the following messages from an ISP when sending out emails. Is there any way to get more information from these ? Users are reporting that they are not receiving any emails? Jul 5 17:02:50 smtp sendmail[11239]:…
Diden
  • 129
  • 3
  • 12
5
votes
4 answers

How I (simply) Forward All Incoming Email to an External Address (ie. Gmail)?

With Google Apps no longer being free for small businesses/teams, I'm left pointing my MX records at my application server. I'd still like to receive email at a Gmail address sent to the domain associated with aforementioned MX records. I have…
user170072
  • 51
  • 1
  • 2
5
votes
2 answers

Sendmail process failed with error code 67

Everything was worked fine but someday sendmail stop working on me. I'am trying the following command line: echo "Body text" | mail -s "Some subject" example@somemail.com And got: /home//dead.letter... Saved message in…
FelikZ
  • 345
  • 1
  • 4
  • 12
5
votes
1 answer

Preventing RCPT TO: username enumeration in sendmail on ubuntu

I'm trying to configure sendmail to prevent it from allowing username enumeration through the RCPT TO: command. I've been googling endlessly and, from what I can see, the best way to achieve this is by adding a catch all email account to the…
Jingo
  • 175
  • 2
  • 6
5
votes
4 answers

What command can I use to search sendmail logs for ALL message details involving a specific recipient.

CENTOS 5.x | Sendmail Occasionally I need to search through sendmail delivery logs to find out what happened to a missing message. This usually involves two (or more) steps: STEP 1: Search /var/log/maillog for the user's email address. For…
Mike B
  • 11,871
  • 42
  • 107
  • 168
5
votes
1 answer

Outgoing mail from linux not being delivered

I can't seem to send mail through my php scripts or through the linux console on my Centos 5.5 LAMP server, when the email is addressed to go to a domain that is hosted by my box. I think it is something to do with the email routing internally, or…
Jason
  • 361
  • 7
  • 19
1 2 3
…
88 89