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Old 02-13-2019, 02:27 AM   #1
tekkir
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Posts: 1
Karma: 10
Join Date: Feb 2019
Location: Santa Barbara, CA
Device: kindle 4th gen
Can't Send books on Calibre do to "Mailbox Unavailable" error message.

Hi

I'm brand new here and was wondering if I could get some help? I just recently got calibre to start emailing my kindle some books. Everything started off fine for about 5 books or so and then I started getting error messages that said "Mailbox Unavailable." I am using gmx so I thought it was spam so I disabled all spam filters to no avail.

This is the portion of the error message when things start to go awry
It looks like it starts with the 550 line:

reply: retcode (250); Msg: Requested mail action okay, completed
send: u'rcpt TO:\r\n'
reply: '550-Requested action not taken: mailbox unavailable\r\n'
reply: '550 Failure sending mail. Try again later\r\n'
reply: retcode (550); Msg: Requested action not taken: mailbox unavailable
Failure sending mail. Try again later

Does anybody have any thoughts on this or similar problems?

Thanks.

Tekkir
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