Not able to send mail on my company's account but gmail in Linux 6.8 Post: 302993138

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Top Forums UNIX for Beginners Questions & Answers Not able to send mail on my company's account but gmail in Linux 6.8 Post 302993138 by drysdalk on Tuesday 7th of March 2017 07:21:32 AM

03-07-2017

Registered User

Hi,

There are so many things that could be going on here. I'm guessing that you're attempting to send e-mail from your own Linux box, using its own local MTA (Postfix, sendmail, etc), and that when you try to send e-mail to your GMail account you get these bounce messages.

Again this is a pure guess since you've not really given us much to go on here, but if (for example) your Linux box has a hostname of foo.company.com, and you're logged in or otherwise running as 'root' at the time, then mail you send from the command line or otherwise directly through your own MTA will go out as 'root@company.com'.

Now, GMail (and many other mail services besides) tend to do all kinds of checking on incoming e-mail to determine whether or not it's valid. One of these checks can be to determine if the apparent e-mail address the sender is sending as actually exists. Now, if your company doesn't have an e-mail address called 'root@company.com' it will fail this check, and GMail will bounce the mail.

Note that if this is what is happening then this is 100% correct and valid behaviour. You almost certainly don't want to be sending mail out from your workstation as 'root@company.com'. Instead, in whatever script or command or program you're sending your mail, you need to set a valid 'From:' address to use instead. That way, mail has a better chance of going out succesfully.

Also, if your company has an e-mail gateway for sending outbound mail from, configure your own local MTA (Sendmail, postfix, etc) to be a smart relay, instead passing all its own local mail to that relay. Or just directly send out to that corporate mail relay instead, rather than submitting e-mail locally. That would be best practice in general, if you have such a facility to make use of.

Hope this helps.

drysdalk

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LEARN ABOUT CENTOS

mail.local

mail.local(1M)                                            System Administration Commands                                            mail.local(1M)

NAME

       mail.local - store mail in a mailbox

SYNOPSIS

       /usr/lib/mail.local [-f sender] [-d] recipient

DESCRIPTION

       mail.local  reads the standard input up to an end-of-file and appends it to each user's mail file (mailbox). This program is intended to be
       used by sendmail(1M) as a mail delivery agent for local mail. It is not a user interface agent.

       Messages are appended to the user's mail file in the /var/mail directory. The user must be a valid user name.

       Each delivered mail message in the mailbox is preceded by a "Unix From line" with the following format:

              From sender_address time_stamp

       The sender_address is extracted from the SMTP envelope address (the envelope address is specified with the -f option).

       A trailing blank line is also added to the end of each message.

       The mail files are locked with a .lock file while mail is appended.

       The mail files are created with mode 660, owner is set to recipient, and group is set to mail. If the ``biff'' service is returned by  get-
       servbyname(3SOCKET),  the  biff  server  is notified of delivered mail. This program also computes the Content-Length: header which will be
       used by the mailbox reader to mark the message boundary.

OPTIONS

       The following options are supported:

       -f sender       Specifies the "envelope from address" of the message. This flag is technically optional,  but should be used.

       -d              Specifies the recipient of the message. This flag is also optional and is supported here for backward  compatibility.  That
                       is, mail.local recipient is the same as mail.local -d recipient.

       -l              Turn on LMTP mode.

       -r from         Specify the sender's name (for backward compatibility).

       -7              Do not advertise 8BITMIME support in LMTP mode.

       -b              Return a permanent error instead of a temporary error if a mailbox exceeds quota.

OPERANDS

       The following operand is supported:

       recipient       The recipient of the mail message.

ENVIRONMENT VARIABLES

       TZ       Used to set the appropriate time zone on the timestamp.

EXIT STATUS

       The following exit values are returned:

       0        Successful operation.

       >0       An error occurred.

FILES

       /tmp/local.XXXXXX       temporary files

       /tmp/lochd.XXXXXX       temporary files

       /var/mail/user_name     user's mail file

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWsndmu                    |
       +-----------------------------+-----------------------------+

SEE ALSO

       mail(1), comsat(1M), sendmail(1M), getservbyname(3SOCKET), attributes(5)

SunOS 5.10                                                          11 Apr 1997                                                     mail.local(1M)