Приветствую, господа!Не могу понять какие настройки подкрутить. postfix используется как один из двух MX-ов домена, в качестве транспорта используется такая схема:
[main.cf]
relayhost =
transport_maps = hash:/usr/local/etc/postfix/transport
[transport]
example.com relay:my.backends.example.com
# host my.backends.example.com
my.backends.example.com has address 1.2.3.4
my.backends.example.com has address 1.2.3.5
my.backends.example.com has address 1.2.3.6
my.backends.example.com has address 1.2.3.7
у постфикса адрес 1.2.3.3, т.е. из той-же сети, в очереди порядка 30к писем из-за того, что письма доставляются 1 из 10:
[maillog]
Nov 8 16:32:49 xmx1 postfix/smtp[29750]: 84FCF23F2E6: to=<irma-irma2010@example.com>, relay=my.backends.example.com[1.2.3.5]:25, delay=112, delays=111/0.98/0.01/0.26, dsn=2.0.0, status=sent (250 Accepted as 16C0FC582844592431574)
Nov 8 16:32:49 xmx1 postfix/smtp[29768]: 69021244193: lost connection with my.backends.example.com[1.2.3.4] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29771]: C477123F7C2: lost connection with my.backends.example.com[1.2.3.5] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29772]: 6AAA82420EB: lost connection with my.backends.example.com[1.2.3.5] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29772]: 6AAA82420EB: lost connection with my.backends.example.com[1.2.3.6] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29772]: 6AAA82420EB: lost connection with my.backends.example.com[1.2.3.7] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29747]: 3CD402416BF: to=<evgenij-ha@example.com>, relay=my.backends.example.com[1.2.3.6]:25, delay=144, delays=142/0.35/0.01/0.95, dsn=2.0.0, status=sent (250 Accepted as 3839FC583616318065004)
Nov 8 16:32:49 xmx1 postfix/smtp[29747]: DED71240CB5: lost connection with my.backends.example.com[1.2.3.7] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29773]: A0A9623F7C4: lost connection with my.backends.example.com[1.2.3.7] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29773]: A0A9623F7C4: lost connection with my.backends.example.com[1.2.3.5] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29773]: A0A9623F7C4: lost connection with my.backends.example.com[1.2.3.4] while receiving the initial server greeting
Nov 8 16:32:49 xmx1 postfix/smtp[29771]: C477123F7C2: to=<alexsamara@example.com>, relay=my.backends.example.com[1.2.3.6]:25, delay=106, delays=104/1.2/0/0.16, dsn=2.0.0, status=sent (250 Accepted as 2771FC583616204465007)
Nov 8 16:32:49 xmx1 postfix/smtp[29770]: E627B240CCA: to=<zaya_85@example.com>, relay=my.backends.example.com[1.2.3.4]:25, delay=19882, delays=19881/1/0/0.41, dsn=5.0.0, status=bounced (host my.backends.example.com[1.2.3.4] said: 521 Mailbox blocked (in reply to RCPT TO command))
иногда ошибка меняется на такую
Nov 8 16:42:59 xmx1 postfix/smtp[30042]: F19CA23FFEF: conversation with my.backends.example.com[1.2.3.6] timed out while sending RCPT TO
а потом и вовсе перестаёт доставлятья, даже flush не помогает, помогает только reload/restart, и опять, 10-100 доставок и затык. хотя telnet проходит на бэкенды.
smtp_connection_cache_on_demand и smtp_never_send_ehlo - не помогают, ситуация не меняется
все настройки дефолтные, кроме
[master.cf]
smtp inet n - n - 333 smtpd
relay unix - - n - 333 smtp
есть идеи почему постфикс себя так ведёт?
