If all mail apps are having identical issue, maybe it's not the apps?
Port 995 is for incoming mail, it's POP3 over SSL.
I think your settings for the outgoing server @gandi.net should be:
- mail.gandi.net
- encryption: SSL (accept any)
- port 465
I just tried connecting, and even though I don't have an account there, the connection itself worked... This is from my desktop system, not from AquaMail, just to see if I'd be able to connect.
kman@roxy:~/Android/proj-tablet/AquaMail$ openssl s_client -crlf -connect mail.gandi.net:465
CONNECTED(00000003)
.....
220 relay5-d.mail.gandi.net ESMTP Postfix
EHLO [20.0.0.1]
250-relay5-d.mail.gandi.net
250-PIPELINING
250-SIZE 25600000
250-VRFY
250-ETRN
250-AUTH PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
quit
221 2.0.0 Bye
closed
You should also be able to STARTTLS instead of SSL, with port 587.