In K9, mail smtp server has both an ipv6 and ipv4 address. However, some places I am, I get an ipv6 address but it can't reach the i[pv6 address on my server, almost certainly a firewall issue. However, K9mail doesn't retry the ipv4 address! It waits until I've left the location or gotten back on the 3g/4g network before retrying to send the mail over another network transport.
Interestingly, it does not do this for the incoming IMAP connection, it connects just fine to the IMAP server on ipv4 despite it also having an ipv6 address. It's like the SMTP and IMAP are using slightly different lower level protocols stacks to open the underlying tcp connections. -- You received this message because you are subscribed to the Google Groups "K-9 Mail" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
