From the mail logs:

Dec 16 01:42:59 alpha-cl-net postfix/smtp[21921]: A6B0D356697: to=< avagayev@verizon.net>, relay=relay.verizon.net[206.46.232.11]:25, delay=394970, delays=394970/0.17/0.26/0, dsn=4.0.0, status=deferred (host relay.verizon.net[206.46.232.11] refused to talk to me: 571 Email from 50.7.166.114 is currently blocked by Verizon Online's anti-spam system. The email sender or Email Service Provider may visit http://www.verizon.net/whitelist and request removal of the block. 131216) Any takers? Do we have users in that domain? -- Bye, Erik. http://efficito.com -- Hosted accounting and ERP. Robust and Flexible. No vendor lock-in.