From the Sailmail Primer FAQs
I only go cruising for a few months at a time. Can I start and stop my SailMail membership
stopped working. Can I extend my membership
for the time the modem
I joined SailMail before I really needed to, can I delay the start of my membership? The dog ate my SailMail Primer and I couldn't get it to work. Can you extend my membership?
I only want to go cruising for 6 months, can I just join SailMail for 6 months?
SailMail is not a fee-for-service company like a phone
company. Instead, SailMail is a Cooperative Association of cruisers that operates a network of radio
stations for our own benefit. It is like a yacht club where the members share the use of the clubhouse. You cannot join and quit a yacht club on a daily basis and just be a member
on the days that you want to use the clubhouse.
Memberships in the SailMail Association are only available for one year periods, and are not refundable for any reason, including changes in a member's cruising plans, or difficulties in using SailMail. See the Terms and Conditions of SailMail on this website for more detail."