2 added 3 characters in body
source | link

you are right.

1.buy a normal ssl certificate for 'yourdomain.com'

2.First createcreate a mx record without mail. suffix

yourdomain.com. 800 IN  MX  10 yourdomain.com.

MxMX domain on the right should be equal to ssl certificate domain that you use for. That's what program checks when sending emails. It helps your mails not ending in Junk mail server, Exim for instance. 

3.The same ssl certificate to yourdomain.com can be used for a web server & mail server because a standard ssl certificate is goodworks for yourdomain.com & www.yourdomain.com (you don't need a wildcard ssl certificate) reference: https://www.clickssl.com/blog/do-i-need-different-ssl-certificates-for-www-non-www-domain

people will use yourdomain.com in their mail software settings to call the mail server. no need to point to mail.yourdomain.com

you are right.

1.buy a normal ssl certificate for 'yourdomain.com'

2.First create a mx record without mail. suffix

yourdomain.com. 800 IN  MX  10 yourdomain.com.

Mx domain should be equal to ssl certificate domain that you use for mail server, Exim for instance.

3.The same ssl certificate to yourdomain.com can be used for a web server & mail server because a standard ssl certificate is good for yourdomain.com & www.yourdomain.com reference: https://www.clickssl.com/blog/do-i-need-different-ssl-certificates-for-www-non-www-domain

people will use yourdomain.com in their mail software. no need to point to mail.yourdomain.com

you are right.

1.buy a normal ssl certificate for 'yourdomain.com'

2.create a mx record without mail. suffix

yourdomain.com. 800 IN  MX  10 yourdomain.com.

MX domain on the right should be equal to ssl certificate domain. That's what program checks when sending emails. It helps your mails not ending in Junk mail. 

3.The same ssl certificate can be used for a web server & mail server because a standard ssl certificate works for yourdomain.com & www.yourdomain.com (you don't need a wildcard ssl certificate) reference: https://www.clickssl.com/blog/do-i-need-different-ssl-certificates-for-www-non-www-domain

people will use yourdomain.com in their mail software settings to call the mail server. no need to point to mail.yourdomain.com

1
source | link

you are right.

1.buy a normal ssl certificate for 'yourdomain.com'

2.First create a mx record without mail. suffix

yourdomain.com. 800 IN  MX  10 yourdomain.com.

Mx domain should be equal to ssl certificate domain that you use for mail server, Exim for instance.

3.The same ssl certificate to yourdomain.com can be used for a web server & mail server because a standard ssl certificate is good for yourdomain.com & www.yourdomain.com reference: https://www.clickssl.com/blog/do-i-need-different-ssl-certificates-for-www-non-www-domain

people will use yourdomain.com in their mail software. no need to point to mail.yourdomain.com