Support has been great helping this noob setting up email. For Namesilo users, here are some brief settings for the DNS records when setting up email. Note to change to your correct values.
MX record:
Hostname: @
Target Hostname: my.domain.com
DKIM (TXT record):
Hostname: cloudron._domainkey
Target Hostname: everything in Expected value: v=...; t=...; p=...
SPF (TXT record):
Hostname: @
Target Hostname: everything in Expected value: v=...; a:my.domain.com ~all
DMARC (TXT record):
Hostname: _dmarc
Target Hostname: everything in Expected value: v=...; p=...; pct=...;
PTR record: see this link: https://docs.cloudron.io/email/#ptr-record
Hope this helps out 