The trial account has limit of only 20 relays / day.
Resolve your email delivery issues /
Reliable Outbound SMTP for e-mails /
Avoid blocked SMTP port 25 problem
Mail SMTP Relay Outbound Service has 30 Day Money Back Guarantee.
You may want just sign up a regular account instead. DNS Exit guarantees that it will works fine and
if you are not satisfied, you can ask for full refund within 30 days.
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