Почтовые клиенты ставил разные, причем это на двух ноутах разных. Вот лог который выдает claws-mail
* Соединение с SMTP сервером: secure22.webhostinghub.com <http://secure22.webhostinghub.com> ...
[08:53:30] SMTP< 220-ehub22.webhostinghub.com <http://220-ehub22.webhostinghub.com> ESMTP Exim 4.69 #1 Thu, 23 Dec 2010 01:53:30 -0500
[08:53:30] SMTP< 220-We do not authorize the use of this system to transport unsolicited,
[08:53:30] SMTP< 220 and/or bulk e-mail.
[08:53:30] ESMTP> EHLO victoria-R528-R728
[08:53:30] ESMTP< 250-ehub22.webhostinghub.com <http://250-ehub22.webhostinghub.com> Hello 178-97-133-95.pool.ukrtel.net <http://178-97-133-95.pool.ukrtel.net> [95.13.79.165]
[08:53:30] ESMTP< 250-SIZE 52428800
[08:53:30] ESMTP< 250-PIPELINING
[08:53:30] ESMTP< 250-AUTH PLAIN LOGIN
[08:53:30] ESMTP< 250 HELP
[08:53:30] ESMTP> AUTH LOGIN
[08:53:30] ESMTP< 334 VXNlcm5hbWU6
[08:53:30] ESMTP> [USERID]
[08:53:31] ESMTP< 334 UGFzc3dvcmQ6
[08:53:31] ESMTP> [PASSWORD]
[08:53:31] ESMTP< 235 Authentication succeeded
[08:53:31] SMTP> MAIL FROM:<admin@3-kita.com>
[08:53:31] SMTP< 250 OK
[08:53:31] SMTP> RCPT TO:<ddv281@gmail.com>
[08:53:31] SMTP< 250 Accepted
[08:53:31] SMTP> DATA
[08:53:31] SMTP< 354 Enter message, ending with "." on a line by itself
[08:53:31] SMTP> . (EOM)
[08:56:16] SMTP< 421 ehub22.webhostinghub.com <http://ehub22.webhostinghub.com> SMTP incoming data timeout - closing connection.
** ошибка во время SMTP сессии
*** При отправке сообщения возникла ошибка:
421 ehub22.webhostinghub.com <http://ehub22.webhostinghub.com> SMTP incoming data timeout - closing connection.