Difference between revisions of "Configure Sendmail Relays - CentOS 7"
Jump to navigation
Jump to search
Michael.mast (talk | contribs) (Created page with "<ref>http://serverfault.com/questions/215388/how-to-configure-sendmail-to-relay-through-a-specific-server</ref> Looking in the /etc/mail/sendmail.mc file add a smarthost entry...") |
Michael.mast (talk | contribs) |
||
| (4 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
| + | ==Purpose== | ||
| + | To configure sendmail to send email. | ||
| + | ==Basic Relay Config== | ||
| + | This will change the server you send emails through, instead of looking up MX records and sending directly to the recipient. Such as Amazon SES<br> | ||
<ref>http://serverfault.com/questions/215388/how-to-configure-sendmail-to-relay-through-a-specific-server</ref> Looking in the /etc/mail/sendmail.mc file add a smarthost entry that looks like the following | <ref>http://serverfault.com/questions/215388/how-to-configure-sendmail-to-relay-through-a-specific-server</ref> Looking in the /etc/mail/sendmail.mc file add a smarthost entry that looks like the following | ||
<br> | <br> | ||
define(`SMART_HOST', `insidemail.tld')dnl | define(`SMART_HOST', `insidemail.tld')dnl | ||
I had to use a fqdn and a host entry to resolve it with. There is a way to use an IP but I have not spent enough time working on this. Just needed it to send mail internally for now. | I had to use a fqdn and a host entry to resolve it with. There is a way to use an IP but I have not spent enough time working on this. Just needed it to send mail internally for now. | ||
| + | ==SMTP Authentication== | ||
| + | For when you want to send emails using an external SMTP server that requires authentication.<ref>https://unix.stackexchange.com/questions/204299/centos-sendmail-smtp-smarthost-with-authentication</ref><ref>https://access.redhat.com/solutions/60803</ref> | ||
| + | ===Amazon SES=== | ||
| + | <ref>https://docs.aws.amazon.com/ses/latest/DeveloperGuide/send-email-sendmail.html</ref><ref>https://www.drupal.org/forum/support/installing-drupal/2003-02-10/mail-being-rejected-data-format-error</ref> | ||
| + | <pre> | ||
| + | yum install sendmail sendmail-cf | ||
| + | sed -i 's/smtp\.your\.provider/email-smtp\.us-east-1\.amazonaws\.com/; s/^dnl\ define(`SMART/define(`SMART/' /etc/mail/sendmail.mc | ||
| + | sed -i 's/dnl\ define(`confAUTH_MECHANISMS/define(`confAUTH_MECHANISMS/' /etc/mail/sendmail.mc | ||
| + | echo "FEATURE(\`authinfo',\`hash /etc/mail/authinfo.db')dnl" >> /etc/mail/sendmail.mc | ||
| + | echo "AuthInfo:email-smtp.us-east-1.amazonaws.com \"U:username\" \"P:password\" \"M:PLAIN\"" >> /etc/mail/authinfo | ||
| + | makemap hash /etc/mail/authinfo < /etc/mail/authinfo | ||
| + | echo "Connect:email-smtp.us-east-1.amazonaws.com RELAY" >> /etc/mail/access | ||
| + | makemap hash /etc/mail/access.db < /etc/mail/access | ||
| + | |||
| + | systemctl restart sendmail | ||
| + | |||
| + | </pre> | ||
Latest revision as of 12:55, 4 May 2018
Purpose
To configure sendmail to send email.
Basic Relay Config
This will change the server you send emails through, instead of looking up MX records and sending directly to the recipient. Such as Amazon SES
[1] Looking in the /etc/mail/sendmail.mc file add a smarthost entry that looks like the following
define(`SMART_HOST', `insidemail.tld')dnl
I had to use a fqdn and a host entry to resolve it with. There is a way to use an IP but I have not spent enough time working on this. Just needed it to send mail internally for now.
SMTP Authentication
For when you want to send emails using an external SMTP server that requires authentication.[2][3]
Amazon SES
yum install sendmail sendmail-cf sed -i 's/smtp\.your\.provider/email-smtp\.us-east-1\.amazonaws\.com/; s/^dnl\ define(`SMART/define(`SMART/' /etc/mail/sendmail.mc sed -i 's/dnl\ define(`confAUTH_MECHANISMS/define(`confAUTH_MECHANISMS/' /etc/mail/sendmail.mc echo "FEATURE(\`authinfo',\`hash /etc/mail/authinfo.db')dnl" >> /etc/mail/sendmail.mc echo "AuthInfo:email-smtp.us-east-1.amazonaws.com \"U:username\" \"P:password\" \"M:PLAIN\"" >> /etc/mail/authinfo makemap hash /etc/mail/authinfo < /etc/mail/authinfo echo "Connect:email-smtp.us-east-1.amazonaws.com RELAY" >> /etc/mail/access makemap hash /etc/mail/access.db < /etc/mail/access systemctl restart sendmail
- ↑ http://serverfault.com/questions/215388/how-to-configure-sendmail-to-relay-through-a-specific-server
- ↑ https://unix.stackexchange.com/questions/204299/centos-sendmail-smtp-smarthost-with-authentication
- ↑ https://access.redhat.com/solutions/60803
- ↑ https://docs.aws.amazon.com/ses/latest/DeveloperGuide/send-email-sendmail.html
- ↑ https://www.drupal.org/forum/support/installing-drupal/2003-02-10/mail-being-rejected-data-format-error
