specify SMTP relay server in mutt

Harris, Don don.harris at unf.edu
Thu Jul 17 13:16:52 UTC 2014

Oops, I see now that the mailx on RHEL5 and RHEL6 and very different

RHEL5: mailx-8.1.1-44.2.2
RHEL6: mailx-12.4-7.el6.x86_64 http://heirloom.sourceforge.net/mailx.html

The legacy mailx on RHEL5 doesn't support all those options. If it's
acceptable in your environment, you can get the newer "Heirloom" mailx
from the EPEL repository. Note that it's the "nail" package on EPEL. See


On 7/17/14 7:52 AM, "Sunhux G" <sunhux at gmail.com> wrote:

>Have to remove both -a & -S in order not to get the syntax
>error but the emails never arrive:
>(I'm able to 'telnet 25' from the server that mailx is issued
># mailx -s "test5" -u root  "smtp=" recipient at xxx.com <
>    Or
># mailx -s "test5" -u root "smtp=" recipient at xxx.com <
>If I issue just the command below from the sendmail relay
>server itself (without the -S & without "smtp=IP_of_SMTP"),
>the emails arrive:
> mailx -s "from SMTP2 server" external_recipient at xxx.com < /tmp/tst.dat
>I browsed thru the man pages for mailx : can't
>locate a -S or "smtp=a.b.c.d" option.  Did I miss
>On Thu, Jul 17, 2014 at 7:37 PM, Sunhux G <sunhux at gmail.com> wrote:
>> What Harris gave with mailx is probably what I'm looking for,
>> just that I can't get the syntax right with -a (or even if I leave
>> out the -a option) :
>> # mailx -s "test" -a /tmp/tst.tar.gz -S "smtp="
>> recipient at xxx.com < /tmp/cis/group.tmp
>>     Or (without the -u )
>> # mailx -s "test" -a /tmp/tst.tar.gz -u whitelistid at xxx.com -S
>> "smtp=" recipient at xxx.com < /tmp/cis/group.tmp
>> mailx: invalid option -- a
>> Usage: mail [-iInv] [-s subject] [-c cc-addr] [-b bcc-addr] to-addr ...
>>             [-- sendmail-options ...]
>>        mail [-iInNv] -f [name]
>>        mail [-iInNv] [-u user]
>> What did I miss?  I've tried with uuencode (referring to some
>> examples on the Net) too but no joy
>> SH
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