fix(mta): use swaks as an alternate to s-nail #2194
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Description
Use swaks as an alternate to s-nail for MTA.
s-nail from past had many issues, there were some compatibility between versions causing troubles. The method used to design the authentication URL is not very good and causes issue with different setup. swaks provide different options to provide authentication information and server location which helps in separating the logic.
swaks looks like a good candidate to replace s-nail.
Changes
SMTPSslVerify
from'Ignore{I}|Strict{S}|Warn{W}'
to simple'Yes{1}|No{2}'
.How to test
Closes #2240