Oct 19 20:04:28 localhost postfix/smtp[15936]: 597F1C21FE: to=servicios@mundo-carteras.com, relay=mx01.1and1.com[74.208.5.21]:25, delay=8821, delays=8821/0.02/0.02/0, dsn=4.0.0, status=deferred (host mx01.1and1.com[74.208.5.21] refused to talk to me: 554-perfora.net (mxeueus003) Nemesis ESMTP Service not available 554-No SMTP service 554 invalid DNS PTR resource record, IP=74.208.86.159)
Oct 19 20:14:28 localhost postfix/qmgr[1062]: 2040BC2928: from=servicios@mundo-carteras.com, size=550, nrcpt=1 (queue active)
Oct 19 20:14:29 localhost postfix/smtp[15988]: 2040BC2928: host mx00.1and1.com[74.208.5.3] refused to talk to me: 554-perfora.net (mxeueus003) Nemesis ESMTP Service not available 554-No SMTP service 554 invalid DNS PTR resource record, IP=74.208.86.159
Oct 19 20:14:29 localhost postfix/smtp[15988]: 2040BC2928: to=admin@avaliontech.com, relay=mx01.1and1.com[74.208.5.21]:25, delay=4750, delays=4749/0.02/0.82/0, dsn=4.0.0, status=deferred (host mx01.1and1.com[74.208.5.21] refused to talk to me: 554-perfora.net (mxeueus004) Nemesis ESMTP Service not available 554-No SMTP service 554 invalid DNS PTR resource record, IP=74.208.86.159)
seems like the function is working fine but the SMTP server is refusing to connect.